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, credits and pico code on cerebellum.neuroinf.jp,
  keeping this site's item types, rankings and menus
- port the MediaWiki pages to function components
- serve all module data from modules/, redirecting the old download and
  /database/file URLs
- tile the plate texture and keep form controls on white
- track page views with GA4

src/database/Database.module.css

@@ -68,3 +68,13 @@
 .database :global(.advancedSearch .fieldDate input) {
     margin: 0 5px 0 0;
 }
+
+/* sanitize.css forms.css leaves form controls transparent; keep them on white. */
+.database :global(.formButton),
+.database :global(.fieldInputText),
+.database :global(.fieldSelect),
+.database :global(.fieldDate select),
+.database :global(.fieldDate input),
+.database :global(.listTable select) {
+    background-color: #ffffff;
+}