feature: basic matchmaking (#2227)

## Description:

Implement a basic matchmaking modal that connects to the api service and
waits for a game id. It then waits until the game starts and connects to
it.

Workers use long polling to check in with the matchmaking server and
receive player assignments.

## Please complete the following:

- [x] I have added screenshots for all UI updates
- [x] I process any text displayed to the user through translateText()
and I've added it to the en.json file
- [x] I have added relevant tests to the test directory
- [x] I confirm I have thoroughly tested these changes and take full
responsibility for any bugs introduced

## Please put your Discord username so you can be contacted if a bug or
regression is found:

evan

---------

Co-authored-by: coderabbitai[bot] <136622811+coderabbitai[bot]@users.noreply.github.com>

src/server/Master.ts

@@ -291,11 +291,6 @@ async function schedulePublicGame(playlist: MapPlaylist) {
   }
 }
 
-// eslint-disable-next-line @typescript-eslint/no-unused-vars
-function sleep(ms: number): Promise<void> {
-  return new Promise((resolve) => setTimeout(resolve, ms));
-}
-
 // SPA fallback route
 app.get("*", function (req, res) {
   res.sendFile(path.join(__dirname, "../../static/index.html"));