chore: migrate cursor config to claude code

[GarthDB]

Summary

• Replace Cursor-specific configuration (.cursorrules, .cursor/rules, .cursor/mcp.json) with Claude Code equivalents (CLAUDE.md)
• Move .cursor/plans/ and .cursor/skills/ to .claude/
• Create CLAUDE.md at root and tools/component-options-editor/CLAUDE.md
• Add .claude/settings.local.json to .gitignore

Extracted from #695 so the config migration can land independently.

Test plan

• Verify .cursor/ directory is fully removed
• Verify .claude/plans/ and .claude/skills/ exist with correct content
• Verify both CLAUDE.md files are picked up by Claude Code
• Verify no MCP/agent-skills changes leaked in

[changeset-bot]

⚠️ No Changeset found

Latest commit: bb7a203

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[GarthDB]

Run report for bb7a2031

Total time: 25s | Comparison time: 27.6s | Estimated savings: 2.6s (9.5% faster)

	Action	Time	Status	Info
⬛️	SetupProto(0.51.4)	0ms	Skipped
🟩	SyncWorkspace	6.8ms	Passed
🟩	SyncProject(componentSchemas)	0.4ms	Passed
🟩	SyncProject(component-options-editor)	0.3ms	Passed
⬛️	SetupToolchain(node:20.17.0)	1.4s	Skipped
🟩	InstallWorkspaceDeps(node:20.17.0)	9.3s	Passed
🟩	RunTask(component-options-editor:type-check)	5.6s	Passed
🟩	RunTask(component-options-editor:lint)	6.1s	Passed
🟩	RunTask(component-options-editor:validate)	8.2s	Passed

Touched files

.claude/plans/size-property-analysis.md
.claude/plans/token-options-mapping-analysis.md
.claude/skills/enhance-sync-pr/SKILL.md
.cursor/mcp.json
.cursor/plans/size-property-analysis.md
.cursor/plans/token-options-mapping-analysis.md
.cursor/rules
.cursor/skills/enhance-sync-pr/SKILL.md
.cursorrules
.gitignore
CLAUDE.md
tools/component-options-editor/.cursorrules
tools/component-options-editor/CLAUDE.md