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

mcp-server/test-server.js

@@ -14,7 +14,7 @@ try {
   const prisma = new PrismaClient({
     datasources: {
       db: {
-        url: 'file:D:/dev_new_pc/Keep/keep-notes/prisma/dev.db'
+        url: 'file:D:/dev_new_pc/Keep/memento-note/prisma/dev.db'
       }
     }
   });