feat: add AGENTS.md and conventions

[amanabiy]

Description

Adds AGENTS.md as a top-level entry point for AI coding agents working in this repo, along with supporting documentation in docs/.

Key changes:

• AGENTS.md — setup, build, and run instructions tailored for agents, with pointers into docs/ for deeper guidance.
• docs/CLOUDSCAPE_COMPONENTS_GUIDE.md — central index for component conventions, styling, testing, and internals. Designed to be reusable across related repos.
• Additional docs linked from the guide covering code style, styling patterns, test authoring, and component API conventions.

I have other repositories reusing the CLOUDSCAPE_COMPONENTS_GUIDE.md for example take a look at this PR for chat-components repository.

Related links, issue #, if available: X2NaAdxtpFej rcDoAlynI8Zj

How has this been tested?

• Verified locally that with considering all the feedbacks from the team, and running against our of predefined tests.

Review checklist

The following items are to be evaluated by the author(s) and the reviewer(s).

Correctness

• Changes include appropriate documentation updates.
• Changes are backward-compatible if not indicated, see CONTRIBUTING.md.
• Changes do not include unsupported browser features, see CONTRIBUTING.md.
• Changes were manually tested for accessibility, see accessibility guidelines.

Security

• If the code handles URLs: all URLs are validated through the checkSafeUrl function.

Testing

• Changes are covered with new/existing unit tests?
• Changes are covered with new/existing integration tests?

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 97.44%. Comparing base (c8acad4) to head (5a85f8a).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #4387   +/-   ##
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  Coverage   97.44%   97.44%           
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  Files         906      906           
  Lines       26561    26561           
  Branches     9582     9582           
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  Hits        25882    25882           
  Misses        673      673           
  Partials        6        6           

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