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/performance-test.js

@@ -5,11 +5,11 @@
  * node test/performance-test.js
  */
 
-import { PrismaClient } from '../keep-notes/prisma/client-generated/index.js';
+import { PrismaClient } from '../memento-note/prisma/client-generated/index.js';
 
 const prisma = new PrismaClient({
   datasources: {
-    db: { url: process.env.DATABASE_URL || 'file:../keep-notes/prisma/dev.db' },
+    db: { url: process.env.DATABASE_URL || 'file:../memento-note/prisma/dev.db' },
   },
 });