Closes #1299

<img width="324" alt="Screenshot 2023-07-07 at 18 56 38"
src="https://github.com/actualbudget/actual/assets/886567/1a4dbd65-52af-44d9-8205-94a4c6c745e5">

Bundle sizes are unchanged but now we no longer pull in the
Electron-specific FS code on the web version

Another batch of components in `desktop-client` converted to TS

Seems to build fine, will test later.