feat: migrate from Create React App to Vite

Rebuild the site on the stack the other converted sites share: Vite 8,
React 19, TypeScript 7, react-router 8, Biome and sanitize.css, with the
site data moved out of the bundle into static-contents/.

- base the database and pico code on the other converted sites,
  keeping this site's layout, pages and item fields
- read file timestamps as Unix seconds in the file and license views
- serve all module data from modules/, redirecting the old download and
  /database/file URLs
- keep form controls on white
- track page views with GA4

tsconfig.node.json

@@ -0,0 +1,25 @@
+{
+    "compilerOptions": {
+        "tsBuildInfoFile": "./node_modules/.tmp/tsconfig.node.tsbuildinfo",
+        "target": "ES2023",
+        "lib": ["ES2023"],
+        "types": ["node"],
+        "skipLibCheck": true,
+
+        /* Bundler mode */
+        "module": "nodenext",
+        "allowImportingTsExtensions": true,
+        "verbatimModuleSyntax": true,
+        "moduleDetection": "force",
+        "noEmit": true,
+
+        /* Linting */
+        "strict": true,
+        "noUnusedLocals": true,
+        "noUnusedParameters": true,
+        "erasableSyntaxOnly": true,
+        "noFallthroughCasesInSwitch": true,
+        "noUncheckedSideEffectImports": true
+    },
+    "include": ["vite.config.ts"]
+}