Updated tasks.json to set the working directory and fixed '[dev]' ( escape character issue )

.vscode/tasks.json

@@ -1,5 +1,8 @@
 {
   "version": "2.0.0",
+  "options": {
+    "cwd": "${workspaceFolder}"
+  },
   "tasks": [
 
     {
@@ -25,7 +28,7 @@
         "pip",
         "install",
         "-e",
-        ".[dev]"
+        ".'[dev]'"
       ],
       "problemMatcher": [],
       "dependsOn": "venv: create"