Remove "uuid" dependency (#3811)

## Description:

One dependency less: remove uuid. It is only used to get the three
random digits after "Anon" if no name is present in localStorage.
Crypto.randomUUID also gives us a UUID v4 and can already be used from
Utils > generateCryptoRandomUUID. Not noticable when it comes to speed
either.

## 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:

tryout33

src/client/UsernameInput.ts

@@ -1,7 +1,6 @@
 import { LitElement, html } from "lit";
 import { customElement, property, state } from "lit/decorators.js";
-import { v4 as uuidv4 } from "uuid";
-import { translateText } from "../client/Utils";
+import { generateCryptoRandomUUID, translateText } from "../client/Utils";
 import { sanitizeClanTag } from "../core/Util";
 import {
   MAX_CLAN_TAG_LENGTH,
@@ -224,7 +223,7 @@ export class UsernameInput extends LitElement {
 }
 
 export function genAnonUsername(): string {
-  const uuid = uuidv4();
+  const uuid = generateCryptoRandomUUID();
   const cleanUuid = uuid.replace(/-/g, "").toLowerCase();
   const decimal = BigInt(`0x${cleanUuid}`);
   const threeDigits = decimal % 1000n;