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-create-note.json

@@ -8,7 +8,7 @@
       "type": "n8n-nodes-langchain.mcptrigger",
       "typeVersion": 1,
       "position": [250, 300],
-      "webhookId": "keep-notes-create",
+      "webhookId": "memento-note-create",
       "description": "MCP trigger to create notes with AI classification"
     },
     {
@@ -24,7 +24,7 @@
         "isArchived": "={{ $json.isArchived || false }}",
         "notebookId": "={{ $json.notebookId }}"
       },
-      "id": "keep-notes-1",
+      "id": "memento-note-1",
       "name": "Keep Notes - Create Note",
       "type": "n8n-nodes-base.httpRequest",
       "typeVersion": 4.2,
@@ -175,7 +175,7 @@
   "tags": [
     {
       "createdAt": "2026-01-18T00:00:00.000Z",
-      "id": "keep-notes-mcp",
+      "id": "memento-note-mcp",
       "name": "Keep Notes MCP"
     }
   ],