Initial commit: mumh5, a modern Mumble client

Electron desktop app with a Svelte 5 interface for any Mumble server.

- Mumble protocol core: TLS, handshake, channels, users, text, plugin data,
  client-side pacing of Murmur's rate limits
- Voice: WebCodecs Opus over the TCP tunnel, voice activity, push to talk,
  always-on, devices, per-user volume and local mute
- Several servers at once, voice on one; server rail with icons and ordering
- Chat: channels, direct messages, side chat, file sharing through f0ckm,
  inline images without it, click-to-play YouTube
- Profiles with rich descriptions, registration, rename, nicknames,
  connection information and moderation menus
- Identity wizard, multiple identities, PKCS#12 import/export, desktop
  Mumble certificate import, certificate pinning and viewer
- Tray icon with voice state
- Unit, server and end-to-end tests against a real Murmur

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

scripts/build-electron.mjs

@@ -0,0 +1,17 @@
+import * as esbuild from 'esbuild';
+
+// Bundles the Electron main and preload scripts to CommonJS in dist-electron/.
+export const options = {
+  entryPoints: { main: 'electron/main.ts', preload: 'electron/preload.ts' },
+  outdir: 'dist-electron',
+  outExtension: { '.js': '.cjs' },
+  bundle: true,
+  platform: 'node',
+  format: 'cjs',
+  target: 'node22',
+  external: ['electron'],
+  sourcemap: true,
+  logLevel: 'info'
+};
+
+if (import.meta.url === `file://${process.argv[1]}`) await esbuild.build(options);