feat: Add support for feedback events on chatbot responses #2165

[marek-mihok]

The PR fulfills these requirements: (check all the apply)

• It's submitted to the main branch.
• When resolving a specific issue, it's referenced in the PR's title (e.g. feat: Add a button #xxx, where "xxx" is the issue number).
• When resolving a specific issue, the PR description includes Closes #xxx, where "xxx" is the issue number.
• If changes were made to ui folder, unit tests (make test) still pass.
• New/updated tests are included

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Usage example:

Screen.Recording.2023-11-08.at.15.15.04.mov

This PR also features an API change - added a feedback event:

/** Create a chatbot card to allow getting prompts from users and providing them with LLM generated answers. */
export interface Chatbot {
  /** An identifying name for this component. */
  name: Id
  /** Chat messages data. Requires list or cyclic buffer. */
  data: Rec
  /** Chat input box placeholder. Use for prompt examples. */
  placeholder?: S
  /** The events to capture on this chatbot. One of 'stop' | 'scroll_up' | 'feedback'. */
  events?: S[]
  /** True to show a button to stop the text generation. Defaults to False. */
  generating?: B
  /** The previous messages to show as the user scrolls up. */
  prev_items?: ChatbotMessage[]
}

Closes #2165

[mturoci]

Thanks @marek-mihok!

[mturoci]

LGTM. Thanks @marek-mihok!