chore: clean up repo - remove docs, tool configs, test files, images

Removed from repo and disk:
- _bmad/, _bmad-output/, .agent/, .claude/, .cursor/, .gemini/,
  .kilocode/, .opencode/, .playwright-mcp/, .ralph/, .github/, bmalph/
- docs/ directory (outdated architecture docs)
- Root markdown files (18 obsolete docs)
- Root images (8 screenshots/test images)
- MCP server docs and N8N workflow JSONs (7 files)
- memento-note junk (test files, temp files, color guides, old DB)
- Root package-lock.json, package.json.bak

Updated .gitignore to prevent re-tracking.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

.gitignore

@@ -39,6 +39,36 @@ prisma/dev.db
 prisma/dev.db-journal
 prisma/*.db
 prisma/*.db-journal
+prisma/client-generated/
 
 # MCP server logs
 mcp-server/*.log
+
+# AI agent tool configs
+.agent/
+.claude/
+.cursor/
+.gemini/
+.kilocode/
+.opencode/
+.playwright-mcp/
+.ralph/
+bmalph/
+
+# Build tool configs
+_bmad/
+_bmad-output/
+.github/
+
+# Root junk
+docs/
+*.png
+*.jpg
+*.jpeg
+package-lock.json
+package.json.bak
+
+# Temp/test files
+test-note-id.txt
+temp_*.txt
+git_version_backup.txt