migrate from raw flake to devenv

.vscode/extensions.json

@@ -1,7 +1,7 @@
 {
   "recommendations": [
-    "arrterian.nix-env-selector",
     "jnoortheen.nix-ide",
-    "detachhead.basedpyright"
+    "detachhead.basedpyright",
+    "mkhl.direnv"
   ]
 }

.vscode/settings.json

@@ -1,13 +1,4 @@
 {
-  "nixEnvSelector.nixFile": "${workspaceFolder}/shell.nix",
-  "terminal.integrated.profiles.linux": {
-    "Nix Shell": {
-      "path": "nix",
-      "args": ["develop"],
-      "icon": "terminal-linux"
-    }
-  },
-  "terminal.integrated.defaultProfile.linux": "Nix Shell",
   "ansible.python.interpreterPath": "/bin/python",
   "python.defaultInterpreterPath": "${env:PYTHON_BIN}"
 }