feat: add to support en & zh language.

[huacnlee]

1. Add to support multiple language, current added en and zh.
2. Switch to use Bun for frontend development and build.

I am sorry to do this, the exists pnpm version is too old, it hard to install, so just changed it. If you don't want accept this, I can revert it.

3. Add make dev command to build WASM and startup Vite dev server.
4. The updates for CI are work will, see:

• https://github.com/huacnlee/timeless-jewels/actions/runs/7636177951)
• https://github.com/huacnlee/timeless-jewels/actions/runs/7636177954

Demo:

https://huacnlee.github.io/timeless-jewels/

The new frontend dev way:

Install Bun

curl -fsSL https://bun.sh/install | bash

Run dev:

cd frontend
bun run dev