Remove AI tooling and working docs from repo tracking

Add .agent/, .mcp.json, CLAUDE.md, AGENTS.md, GEMINI.md, QUICKSTART.md,
bootstrap.sh, docs/memory/, and docs/reference/ (impeccable, vercel,
workflow guides) to .gitignore. Files remain on disk for local use but
are no longer tracked or pushed to remotes.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

.gitignore

@@ -8,9 +8,25 @@ tokens/export/
 .DS_Store
 *.tgz
 
-# Claude / Playwright artifacts
+# AI agent tooling
 .playwright-mcp/
 .claude/
+.agent/
+.mcp.json
+CLAUDE.md
+AGENTS.md
+GEMINI.md
+QUICKSTART.md
+bootstrap.sh
+
+# Memory and reference docs (not for sharing)
+docs/memory/
+docs/reference/impeccable/
+docs/reference/vercel/
+docs/reference/cross-tool-workflow.md
+docs/reference/how-to-work-with-both-tools.md
+docs/reference/mcp-setup.md
+docs/reference/retroactive-review-plan.md
 
 # Build logs
 build-storybook.log