[AI] Add Nx MCP plugin and workspace guidelines to AGENTS.md

[JanJakes]

Summary

Runs npx nx configure-ai-agents to:

• Configure the Nx Claude Code plugin marketplace and enable the nx plugin in .claude/settings.json
• Append Nx workspace guidelines to AGENTS.md, covering task running conventions, scaffolding, and nx_docs usage

Test plan

• Verify .claude/settings.json is valid JSON and the Nx plugin loads correctly
• Confirm the Nx configuration section in AGENTS.md renders properly and doesn't conflict with existing content

[Copilot]

Pull request overview

Adds Nx AI-agent support by enabling the Nx plugin marketplace in Claude settings and documenting Nx workspace conventions for agents.

Changes:

• Adds Nx workspace “agent guidelines” section to AGENTS.md (task running, generators, when to use nx_docs)
• Configures an additional Claude plugin marketplace (GitHub-backed) and enables the nx plugin in .claude/settings.json

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 3 comments.

File	Description
AGENTS.md	Adds an Nx-specific guidance block for agents, intended to be auto-updatable via marker comments
.claude/settings.json	Registers the Nx Claude plugins marketplace and enables the nx plugin

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[brandonpayton]

Thanks, @JanJakes, this looks fine. It will be interesting to see how all the different agent-readiness PRs work together.