chore: Update to use new official dotenv extension

Author: wottpal

.vscode/extensions.json

@@ -7,7 +7,7 @@
     "rust-lang.rust-analyzer",
     "ink-analyzer.ink-analyzer",
     "gruntfuggly.todo-tree",
-    "mikestead.dotenv",
+    "dotenv.dotenv-vscode",
     "bradlc.vscode-tailwindcss"
   ]
 }

.vscode/settings.json

@@ -11,7 +11,6 @@
     "source.fixAll.eslint": "always"
   },
   "files.associations": {
-    ".env.*": "dotenv",
     "*.css": "tailwindcss"
   },
   "[javascriptreact][typescriptreact][javascript][typescript][markdown][html][css][scss][sass][json][jsonc][yaml]": {