Add option to enable/disable function calling in DevChat

- Added a new configuration option "DevChat.EnableFunctionCalling" in package.json.
- This option allows users to enable or disable function calling for GPT.
- Updated devchat.ts to check this configuration before pushing function options.

package.json

@@ -149,6 +149,12 @@
 						}
 					},
 					"description": "Which Python interpreter to use with DevChat?"
+				},
+				"DevChat.EnableFunctionCalling": {
+					"type": "boolean",
+					"default": false,
+					"description": "Enable/Disable function calling for GPT.",
+					"when": "DevChat.llmModel == 'OpenAI'"
 				}
 			}
 		},

src/toolwrapper/devchat.ts

@@ -102,7 +102,8 @@ class DevChat {
 			}
 		}
 
-		if (options.functions) {
+		const isEnableFunctionCalling = UiUtilWrapper.getConfiguration('DevChat', 'EnableFunctionCalling');
+		if (options.functions && isEnableFunctionCalling) {
 			args.push("-f", options.functions);
 		}