chore: Clean up unused files, imports, and work on getting end-to-end tests and unit tests running (#2272)

.vscode/extensions.json

@@ -1,7 +1,6 @@
 {
   "recommendations": [
     "esbenp.prettier-vscode",
-    "sysoev.language-stylus",
     "dbaeumer.vscode-eslint",
     "mikestead.dotenv",
     "bungcip.better-toml",