chore: move EventBus to TS

[Antreesy]

☑️ Resolves

• Fix typings for once method

🖌️ UI Checklist

🖼️ Screenshots / Screencasts

		EventBus.once('*', (...args) => {
			console.log('wild once', ...args)
		})

		EventBus.on('*', (...args) => {
			console.log('wild on', ...args)
		})

🏁 Checklist

• 🌏 Tested with different browsers / clients:
  • Chromium (Chrome / Edge / Opera / Brave)
  • Firefox
  • Safari
  • Talk Desktop
  • Not risky to browser differences / client

[ShGKme]

ShGKme force-pushed

Branch mismatch, push and dropped back

[Antreesy]

/backport to stable30