add hub examples directory with some existing examples

app/assets/hub/kong-inc/ai-proxy/anthropic.yaml

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+description: |
+  This configuration enables AI Proxy with Anthropic.
+  
+  Apply this plugin to a route with `"paths[]=~/anthropic-chat$"` configured.
+  Replace the `<anthropic_key>` with your own API key.
+
+config:
+  route_type: "llm/v1/chat"
+  auth:
+    header_name: "apikey"
+    header_value: "<anthropic_key>"  # add your own Anthropic API key
+  model:
+    provider: "anthropic"
+    name: "claude-2.1"
+    options:
+      max_tokens: 512
+      temperature: 1.0
+      top_p: 256

app/assets/hub/kong-inc/ai-proxy/azure.yaml

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+description: |
+  This configuration enables AI Proxy with Azure OpenAI Service.
+  
+  Apply this plugin to a route with `"paths[]=~/azure-chat$"` configured.
+  Replace the `<azure_ai_access_key>` with your own API key.
+
+config:
+  route_type: "llm/v1/chat"
+  auth:
+    header_name: "api-key"
+    header_value: "<azure_ai_access_key>" # add your own Azure OpenAI access key
+  model:
+    provider: "azure"
+    name: "gpt-35-turbo"
+    options:
+      azure_instance: "ai-proxy-regression"
+      azure_deployment_id: "kong-gpt-3-5"

app/assets/hub/kong-inc/ai-proxy/cohere.yaml

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+description: |
+  This configuration enables AI Proxy with Cohere.
+  
+  Apply this plugin to a route with `"paths[]=~/cohere-chat$"` configured.
+  Replace the `<cohere_key>` with your own API key.
+
+config:
+  route_type: "llm/v1/chat"
+  auth:
+    header_name: "Authorization"
+    header_value: "Bearer <cohere_key>"  # add your own Cohere API key
+  model:
+    provider: "cohere"
+    name: "command"
+    options:
+      max_tokens: 512
+      temperature: 1.0

app/assets/hub/kong-inc/ai-proxy/llama2.yaml

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+description: |
+  This configuration enables AI Proxy with Llama2.
+
+  You need a running Llama2 instance to use this option.
+  Apply this plugin to a route with `"paths[]=~/llama2-chat$"` configured.
+
+config:
+  route_type: "llm/v1/chat"
+  model:
+    provider: "llama2"
+    name: "llama2"
+    llama2_format: "ollama"
+    upstream_url: "http://llama2-server.local:11434/api/chat"

app/assets/hub/kong-inc/ai-proxy/mistral.yaml

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+description: |
+  This configuration enables AI Proxy with Mistral.
+
+  You need a running Mistral instance to use this option.
+  Apply this plugin to a route with `"paths[]=~/mistral-chat$"` configured.
+  Replace the `<MISTRAL_AI_KEY>` with your own API key.
+
+config:
+  route_type: "llm/v1/chat"
+  auth:
+    header_name: "Authorization"
+    header_value: "Bearer <MISTRAL_AI_KEY>"
+  model:
+    provider: "mistral"
+    name: "mistral-tiny"
+    mistral_format: "openai"
+    upstream_url: "https://api.mistral.ai/v1/chat/completions"

app/assets/hub/kong-inc/ai-proxy/openai.yaml

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+description: |
+  This configuration enables AI Proxy with OpenAI.
+
+  Apply this plugin to a route with `"paths[]=~/openai-chat$"` configured.
+  Replace the `<openai-key>` with your own API key.
+
+config:
+  route_type: "llm/v1/chat"
+  auth:
+    header_name: "Authorization"
+    header_value: "Bearer <openai_key>"  # add your own OpenAI API key
+  model:
+    provider: "openai"
+    name: "gpt-4"
+    options:
+      max_tokens: 512
+      temperature: 1.0

app/assets/hub/kong-inc/http-log/splunk.yaml

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+description: |
+  Send Kong Gateway logs to Splunk in raw text using the `/services/collector/raw` Splunk endpoint.
+
+  Adjust the `http_endpoint` and its secure token in `headers.Authorization` to your own values.
+
+config:
+  headers:
+    Authorization: "Splunk 123456"
+  http_endpoint: "https://example.splunkcloud.com:8088/services/collector/raw"
+  method: POST
+  timeout: 3000
+  retry_count: 1

app/assets/hub/kong-inc/openid-connect/auth0.yaml

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+description: |
+  Authenticate headless service consumers using Auth0's identity provider.
+
+  This configuration uses the `client_credentials` grant, and requires you to have 
+  an Auth0 API configured with the `openid` scope. Find your `issuer` URL and `audience`
+  in your Auth0 API configuration.
+
+config:
+  auth_methods:
+    - client_credentials
+  issuer: "https://<auth0 API name>.auth0.com/.well-known/openid-configuration"
+  audience: "<auth0 API identifier>"
+
+  # Need to re-check this example, it looks incomplete. Does it actually work?
+

app/assets/hub/kong-inc/openid-connect/azure-ad.yaml

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+description: |
+  Authenticate browser clients using an Azure AD identity provider.
+
+  Replace the issuer URL, client ID, client secret, redirect URI, 
+  and the custom scope with your own Azure IdP configuration.
+
+config:
+  issuer: "https://login.microsoftonline.com/YOUR_DIRECTORY_ID/v2.0/.well-known/openid-configuration"
+  client_id: "YOUR_CLIENT_ID"
+  client_secret: "YOUR_CLIENT_SECRET"
+  redirect_uri: "https://example.com/api"
+  scopes:
+    - openid
+    - email
+    - profile
+    - "YOUR_CLIENT_ID/.default"
+  verify_parameters: false

app/assets/hub/kong-inc/openid-connect/curity.yaml

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+description: |
+  Integrate Kong Gateway and the Curity Identity Server for introspection using the
+  Phantom Token pattern.
+
+  Replace the issuer URL, client ID, and client secret with your own values.
+
+config:
+  issuer: "https://idsvr.example.com/oauth/v2/oauth-anonymous"
+  client_id: "YOUR_CLIENT_ID"
+  client_secret: "YOUR_CLIENT_SECRET"
+  scopes_required:
+    - openid
+  hide_credentials: true
+  upstream_access_token_header: nil
+  upstream_headers_claims:
+    - phantom_token
+  upstream_headers_names: 
+    - phantom_token
+  auth_methods:
+    - introspection

app/assets/hub/kong-inc/openid-connect/google.yaml

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+description: |
+  Authenticate browser clients using Google's identity provider.
+
+  Replace the issuer URL, client ID, client secret, and redirect URI
+  with your own Google IdP configuration.
+
+config:
+  issuer: "https://accounts.google.com/.well-known/openid-configuration"
+  client_id: "YOUR_CLIENT_ID"
+  client_secret: "YOUR_CLIENT_SECRET"
+  redirect_uri: "https://example.com/api"
+  scopes:
+    - openid
+    - email

app/assets/hub/kong-inc/openid-connect/okta.yaml

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+description: |
+  Authenticate browser clients using Okta.
+
+  Replace the issuer URL, client ID, client secret, and redirect URI
+  with your own Okta configuration values.
+
+config:
+  issuer: "https://YOUR_OKTA_DOMAIN/oauth2/YOUR_AUTH_SERVER/.well-known/openid-configuration"
+  client_id: "YOUR_CLIENT_ID"
+  client_secret: "YOUR_CLIENT_SECRET"
+  redirect_uri: "https://example.com/api"
+  scopes_claim:
+    - scp
+  scopes:
+    - openid
+    - email
+    - profile
+  auth_methods:
+    - authorization_code