fix: make watch non-default task and stress sourcemap true

Author: vincentsong

.vscode/launch.json

@@ -13,6 +13,7 @@
 			"args": [
 				"--extensionDevelopmentPath=${workspaceFolder}",
 			],
+			"sourceMaps": true,
 			"outFiles": ["${workspaceFolder}/dist/**/*.js"],
 			"preLaunchTask": "compile",
 			"env": {

.vscode/tasks.json

@@ -26,7 +26,7 @@
 			},
 			"group": {
 				"kind": "build",
-				"isDefault": true
+				"isDefault": false
 			}
 		},
 		{