docs: pluralize add_langgraph_fastapi_endpoint due to [ag-ui-protocol/ag-ui/pull/701](ag-ui-protocol/ag-ui#701)

Author: MarlzRana

docs/content/docs/langgraph/persistence/message-persistence.mdx

@@ -14,7 +14,7 @@ from fastapi import FastAPI
 from contextlib import asynccontextmanager
 from langgraph.checkpoint.postgres.aio import AsyncPostgresSaver
 from copilotkit import LangGraphAGUIAgent
-from ag_ui_langgraph import add_langgraph_fastapi_endpoint
+from ag_ui_langgraph import add_langgraph_fastapi_endpoints
 
 graph = None
 @asynccontextmanager
@@ -31,7 +31,7 @@ async def lifespan(app: FastAPI):
 
 app = FastAPI(lifespan=lifespan)
 
-add_langgraph_fastapi_endpoint(
+add_langgraph_fastapi_endpoints(
     app=app,
     agent=LangGraphAGUIAgent(
         name="research_agent",

docs/content/docs/langgraph/troubleshooting/migrate-to-agui.mdx

@@ -94,11 +94,11 @@ Everything else (mainly your graph) stays the same.
         ```python
         from fastapi import FastAPI
         from copilotkit import LangGraphAGUIAgent
-        from ag_ui_langgraph import add_langgraph_fastapi_endpoint
+        from ag_ui_langgraph import add_langgraph_fastapi_endpoints
         from .agent import graph
 
         app = FastAPI()
-        add_langgraph_fastapi_endpoint(
+        add_langgraph_fastapi_endpoints(
             app=app,
             agent=LangGraphAGUIAgent(
                 name="sample_agent",

docs/snippets/langgraph-platform-deployment-tabs.mdx

@@ -64,15 +64,15 @@ import { Tab } from "../components/react/tabs";
     from fastapi import FastAPI
     import uvicorn
     from copilotkit import LangGraphAGUIAgent # [!code highlight]
-    from ag_ui_langgraph import add_langgraph_fastapi_endpoint # [!code highlight]
+    from ag_ui_langgraph import add_langgraph_fastapi_endpoints # [!code highlight]
     from sample_agent.agent import graph # the coagents-starter path, replace this if its different # [!code highlight]
 
     from dotenv import load_dotenv
     load_dotenv()
 
     app = FastAPI()
     # [!code highlight:9]
-    add_langgraph_fastapi_endpoint(
+    add_langgraph_fastapi_endpoints(
       app=app,
       agent=LangGraphAGUIAgent(
         name="sample_agent", # the name of your agent defined in langgraph.json

examples/coagents-research-canvas/agent/research_canvas/demo.py

@@ -12,7 +12,7 @@
 from copilotkit.crewai import CrewAIAgent
 from research_canvas.crewai.agent import ResearchCanvasFlow
 from research_canvas.langgraph.agent import graph
-from ag_ui_langgraph import add_langgraph_fastapi_endpoint
+from ag_ui_langgraph import add_langgraph_fastapi_endpoints
 
 # from contextlib import asynccontextmanager
 # from langgraph.checkpoint.sqlite.aio import AsyncSqliteSaver
@@ -59,7 +59,7 @@
     ],
 )
 
-add_langgraph_fastapi_endpoint(
+add_langgraph_fastapi_endpoints(
     app=app,
     agent=LangGraphAGUIAgent(
         name="research_agent",
@@ -68,7 +68,7 @@
     ),
     path="/copilotkit/agents/research_agent"
 )
-add_langgraph_fastapi_endpoint(
+add_langgraph_fastapi_endpoints(
     app=app,
     agent=LangGraphAGUIAgent(
         name="research_agent_google_genai",

examples/coagents-starter/agent-py/sample_agent/demo.py

@@ -11,11 +11,11 @@
 from fastapi import FastAPI
 import uvicorn
 from copilotkit import LangGraphAGUIAgent
-from ag_ui_langgraph import add_langgraph_fastapi_endpoint
+from ag_ui_langgraph import add_langgraph_fastapi_endpoints
 from sample_agent.agent import graph
 
 app = FastAPI()
-add_langgraph_fastapi_endpoint(
+add_langgraph_fastapi_endpoints(
     app=app,
     agent=LangGraphAGUIAgent(
         name="sample_agent",