Add method add_pattern and delete_pattern

main.py

@@ -887,15 +887,12 @@ async def fastapi_add_pattern(network: str, pattern: str, factors: list[float])
             'id' : pattern,
             'factors' : factors
          }
-    return set_pattern(network, ChangeSet(ps))
+    return add_pattern(network, ChangeSet(ps))
 
 @app.post("/deletepattern/")
 async def fastapi_delete_pattern(network: str, pattern: str) -> ChangeSet:
-    ps = { 
-            'id' : pattern,
-            'factors' : None
-         }
-    return set_pattern(network, ChangeSet(ps))
+    ps = { 'id' : pattern }
+    return delete_pattern(network, ChangeSet(ps))
 
 @app.get("/getpatternproperties/")
 async def fastapi_get_pattern_properties(network: str, pattern: str) -> dict[str, Any]: