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

ts/tsconfig.json

@@ -0,0 +1,8 @@
+{
+    "compilerOptions": {
+        "outDir": "../data/static",
+        "target": "es6",
+        "lib": ["dom", "es2017"],
+        "types": ["jquery"]
+    }
+}