feat: Add collaboration tool and UI

Integrates real-time document collaboration with a new tool and UI.

Co-authored-by: nicsins <nicsins@gmail.com>

python/tools/collaboration_tool.py

@@ -0,0 +1,24 @@
+from python.helpers.tool import Tool, Response
+from python.collaboration import documents, socketio
+
+class CollaborationTool(Tool):
+    async def execute(self, action, content="", doc_id="default", **kwargs):
+        if action == "read":
+            text = documents.get(doc_id, "")
+            return Response(message=f"Document content:\n{text}", break_loop=False)
+        
+        elif action == "write":
+            # Overwrite
+            documents[doc_id] = content
+            socketio.emit('document_updated', {'content': content}, room=doc_id)
+            return Response(message="Document updated.", break_loop=False)
+            
+        elif action == "append":
+            current = documents.get(doc_id, "")
+            new_content = current + "\n" + content
+            documents[doc_id] = new_content
+            socketio.emit('document_updated', {'content': new_content}, room=doc_id)
+            return Response(message="Appended to document.", break_loop=False)
+
+        else:
+             return Response(message="Unknown action. Use read, write, or append.", break_loop=False)