Add standard naming convention for files/images that are contributed to the docs site

[theekrystallee]

Problem

🆕🐥 First Timers Only

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The goal of this issue and all other issues labeled by 'good first issue' is to help you make your first contribution to Hedera.

👾 Description of the issue

We need to officially document the naming convention for files/images that are uploaded to the docs site. Currently, the names of files are all over the place, but we have decided on the kebab case (spinal case).

Proposed Solution:

1. Naming Convention Standard:

• The new naming convention will be kebab case, using all lowercase letters with hyphens between words.
• Example:
  ✅ new-naming-standard-for-files
  ❌ LOWERCASE-ONLY-PLEASE

2. Update the Style Guide:

• Add the standardized kebab case naming convention to the style guide for consistency across all file names on the docs site.

By implementing this solution, we will ensure file names are standardized, readable, and consistent across the docs repo.

📋 Step by step guide to do a contribution

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• Check GitHub Actions: Several GitHub Actions will be triggered automatically for each PR. If a GitHub Action fails and you do not understand the cause of that error do not hesitate to add a comment to the PR and ask the Hedera developer community for support.
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🤔 Additional Information

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Alternatives

No response