Reorganize .github/copilot-instructions.md into AGENTS.md and material3/AGENTS.md

[Copilot]

Completes the reorganization of .github/copilot-instructions.md into appropriate agent context files, making all instructions universal for AI agents (not just GitHub Copilot).

Changes

• AGENTS.md (root): Comprehensive agent context file containing all coding conventions, patterns, build/test commands, project structure, troubleshooting, API change policy, visual validation, expect/actual patterns, component organization, CSS shortcuts, fillMax*Stretch guidance, "copied and adapted" code patterns, and the adding new components checklist — available for all modules
• material3/AGENTS.md: Material 3 component lookup guidance (searching m3.material.io) as path-specific instructions
• Deleted .github/copilot-instructions.md: All content transferred to the above files
• Removed: Hardcoded dependency version numbers, build timing estimates, root directory file list, repository statistics, "trust these instructions" meta-notes (maintenance burdens or non-actionable items)

Final structure

Destination	Content type
AGENTS.md (root)	Build commands, project structure, troubleshooting, API change policy, visual validation, code style, all coding conventions (expect/actual patterns, component organization, CSS shortcuts, fillMax*Stretch, "copied and adapted" code, platform-limited parameters, unsupported APIs, avoiding duplicates, adding new components)
material3/AGENTS.md	M3 component lookup (m3.material.io)
Removed	Hardcoded version numbers, build timing estimates, root file list, repo statistics, meta-notes

[ShreckYe]

@copilot My feedback:

1. .github/copilot-instructions.md should not be kept, its content should be moved completely to other places to be universal for all AI agents;
2. Your proposed content for common/AGENTS.md and material3/AGENTS.md should actually be available for all modules, only except for "M3 lookup".

The rest looks OK. Continue.

[Copilot]

@copilot My feedback:

1. .github/copilot-instructions.md should not be kept, its content should be moved completely to other places to be universal for all AI agents;
   ...

Done in 5db3afb. Moved all content from .github/copilot-instructions.md into root AGENTS.md (universal for all modules) and created material3/AGENTS.md with only the M3 lookup guidance. The old file is deleted. Removed hardcoded versions, timing estimates, and other maintenance-burden items as previously agreed.

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud