rewrite* most web ui code in typescript

i wanted to split up the web ui components into multiple files, and
figured it'd be a good chance to try out typescript. run make typescript
to compile everything in ts/ and put it in data/static/.

This is less of a rewrite and more of a refactoring, most of it still
works the same but bits have been cleaned up too.

Remaining javascript found in setup.js and form.html

package.json

@@ -17,6 +17,7 @@
   },
   "homepage": "https://github.com/hrfee/jellyfin-accounts#readme",
   "dependencies": {
+    "@types/jquery": "^3.5.1",
     "autoprefixer": "^9.8.5",
     "bootstrap": "^5.0.0-alpha1",
     "bootstrap4": "npm:bootstrap@^4.5.0",