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/n8n-workflow-reminder-notifications.json

@@ -340,7 +340,7 @@
   "tags": [
     {
       "createdAt": "2026-01-18T00:00:00.000Z",
-      "id": "keep-notes-mcp",
+      "id": "memento-note-mcp",
       "name": "Keep Notes MCP"
     }
   ],