Improve web infrastructure

Upgrade npm packages that were locked to old versions due to now-resolved problems
Remove unused/unnecessary dependencies and their configurations
Fix VS Code format on save
Fix VS Code removing EOF newline in JSON files in conflict with npm
Remove JSON files from ESLint because it doesn't properly support JSON
Add detailed comments to web-related configuration files

frontend/src/main.ts

@@ -3,7 +3,6 @@ import { createApp } from "vue";
 import { fullscreenModeChanged } from "@/utilities/fullscreen";
 import { onKeyUp, onKeyDown, onMouseMove, onMouseDown, onMouseUp, onMouseScroll, onWindowResize } from "@/utilities/input";
 import "@/utilities/errors";
-
 import App from "@/App.vue";
 
 // Bind global browser events

frontend/src/types.d.ts

@@ -1,8 +1,10 @@
+// Allow JS import statements to work with .vue files
 declare module "*.vue" {
 	const component: DefineComponent;
 	export default component;
 }
 
+// Allow JS import statements to work with .svg files
 declare module "*.svg" {
 	const component: DefineComponent;
 	export default component;