chore: upgrade tooling stack

- TypeScript 3.9 -> 5.8
- ESLint 6 -> 9 (flat config)
- Prettier 1 -> 3
- eslint-plugin-vue 6 -> 9
- Add vue-tsc for type checking
- Migrate Sass @import to @use syntax
- Fix Pinia persistence config for v4
- Add Spotify type declarations
- Remove unused registerServiceWorker.ts

tsconfig.json

@@ -1,8 +1,8 @@
 {
   "compilerOptions": {
-    "target": "esnext",
-    "module": "esnext",
-    "moduleResolution": "node",
+    "target": "ES2022",
+    "module": "ESNext",
+    "moduleResolution": "bundler",
     "strict": true,
     "jsx": "preserve",
     "importHelpers": true,
@@ -10,16 +10,19 @@
     "allowSyntheticDefaultImports": true,
     "sourceMap": true,
     "baseUrl": ".",
-    "types": ["vite/client"],
+    "types": ["vite/client", "node"],
     "paths": {
       "@/*": ["src/*"]
     },
-    "lib": ["esnext", "dom", "dom.iterable", "scripthost"]
+    "lib": ["ES2022", "DOM", "DOM.Iterable"],
+    "skipLibCheck": true,
+    "noEmit": true
   },
   "include": [
     "src/**/*.ts",
     "src/**/*.tsx",
     "src/**/*.vue",
+    "src/**/*.d.ts",
     "tests/**/*.ts",
     "tests/**/*.tsx"
   ],