docs: introduces doc files for LLM agents

[spencercjh]

Parts of this PR were drafted with assistance from Warp (with claude-4.5-sonnet) and fully reviewed and edited by me. I take full responsibility for all changes.

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[Copilot]

Pull request overview

This pull request introduces documentation files specifically designed to provide context and guidance to LLM agents working with the Chaos Mesh documentation website codebase. The documentation covers project architecture, development workflows, and important technical details.

Key changes:

• Adds comprehensive AGENTS.md file documenting the Docusaurus 3-based website structure, development commands, versioning system, and i18n architecture
• Creates pointer files (WARP.md, CLAUDE.md, AGENT.md) that reference AGENTS.md for different LLM agent tools

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 5 comments.

File	Description
AGENTS.md	Main documentation file providing comprehensive guidance on project structure, development workflows, configuration, and best practices for LLM agents
WARP.md	Pointer file containing reference to AGENTS.md for Warp terminal AI agent
CLAUDE.md	Pointer file containing reference to AGENTS.md for Claude AI agent
AGENT.md	Pointer file containing reference to AGENTS.md for generic AI agents

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[Copilot]

The reference to ".nvmrc for exact version" is misleading. The .nvmrc file contains "lts/*" which specifies the latest LTS version, not an exact version number. This statement should be corrected to indicate that .nvmrc specifies the LTS version rather than an exact version.

Suggested change

	Requires Node.js **>=22.0.0** (specified in `package.json` engines field). Check `.nvmrc` for exact version.
	Requires Node.js **>=22.0.0** (specified in `package.json` engines field). `.nvmrc` specifies the latest LTS Node.js version via `lts/*`.