Model and DB refactor (#61)

- [x] Move from `sqlx` to `rusqlite`
- [x] Generate TS types from Rust models

src-web/lib/gen/Cookie.ts

@@ -0,0 +1,5 @@
+// This file was generated by [ts-rs](https://github.com/Aleph-Alpha/ts-rs). Do not edit this file manually.
+import type { CookieDomain } from "./CookieDomain";
+import type { CookieExpires } from "./CookieExpires";
+
+export type Cookie = { raw_cookie: string, domain: CookieDomain, expires: CookieExpires, path: [string, boolean], };