feat: agent templates and seeding premade agents (#1910)

* feat: agent templates and seeding premade agents

* fix: ensure ObjectId is used for source reference in agent configuration

* fix: improve source handling in DatabaseSeeder and update tool config processing

* feat: add prompt handling in DatabaseSeeder for agent configuration

* Docs premade agents

* link to prescraped docs

* feat: add template agent retrieval and adopt agent functionality

* feat: simplify agent descriptions in premade_agents.yaml  added docs

---------

Co-authored-by: Pavel <pabin@yandex.ru>
Co-authored-by: Alex <a@tushynski.me>

application/agents/react_agent.py

@@ -235,4 +235,4 @@ class ReActAgent(BaseAgent):
             )
         except Exception as e:
             logger.error(f"Error extracting content: {e}")
-        return "".join(collected)
+        return "".join(collected)

application/api/user/agents/routes.py

@@ -1434,4 +1434,4 @@ class RemoveSharedAgent(Resource):
             current_app.logger.error(f"Error removing shared agent: {err}")
             return make_response(
                 jsonify({"success": False, "message": "Server error"}), 500
-            )
+            )