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/README.md

@@ -55,7 +55,7 @@ Add to your Cursor MCP client configuration:
 ```json
 {
   "mcpServers": {
-    "keep-notes": {
+    "memento-note": {
       "command": "node",
       "args": ["D:/dev_new_pc/Keep/mcp-server/index.js"]
     }
@@ -269,7 +269,7 @@ Delete a label by ID.
 ## Database
 
 The MCP server connects to the same SQLite database as the Keep Notes web app located at:
-`D:/dev_new_pc/Keep/keep-notes/prisma/dev.db`
+`D:/dev_new_pc/Keep/memento-note/prisma/dev.db`
 
 ## Prisma Schema Reference