chore: clean up repo for public release

- Remove BMAD framework, IDE configs, dev screenshots, test files,
  internal docs, and backup files
- Rename keep-notes/ to memento-note/
- Update all references from keep-notes to memento-note
- Add Apache 2.0 license with Commons Clause (non-commercial restriction)
- Add clean .gitignore and .env.docker.example

.gitignore

@@ -1,46 +1,52 @@
 # Dependencies
 node_modules/
-.pnp
-.pnp.js
 
-# Testing
-coverage/
-
-# Next.js
+# Build output
 .next/
 out/
 build/
-
-# Production
 dist/
 
-# Misc
-.DS_Store
-*.pem
-
-# Debug
-npm-debug.log*
-yarn-debug.log*
-yarn-error.log*
-
-# Local env files
+# Environment files
 .env
-.env*.local
+.env.local
+.env.docker
 
-# Vercel
-.vercel
+# Database
+*.db
+*.db-journal
+prisma/dev.db
 
-# TypeScript
+# Generated
+memento-note/prisma/generated/
+mcp-server/prisma/generated/
+
+# IDE
+.vscode/
+.idea/
+*.swp
+*.swo
+*~
+
+# OS
+.DS_Store
+Thumbs.db
+
+# Logs
+*.log
+npm-debug.log*
+
+# Uploads (user data)
+memento-note/public/uploads/
+
+# Test
+coverage/
+test-results/
+playwright-report/
+
+# Docker
+docker-data/
+
+# Misc
 *.tsbuildinfo
 next-env.d.ts
-
-# Prisma
-prisma/dev.db
-prisma/dev.db-journal
-prisma/*.db
-prisma/*.db-journal
-
-# MCP server logs
-mcp-server/*.log
-.ralph/logs/
-_bmad-output/