Fix VNC required argument handshake

[ZacharyZcR]

Summary

• handle guacd required/require argument requests in the guacamole-lite patch
• send stored connection settings back through argv/blob/end streams instead of forwarding the request to the browser
• add a regression test that verifies the patched guacamole-lite client handles dynamic argument requests

Verification

• node scripts/patch-guacamole-lite.cjs
• npm exec vitest run -- scripts/patch-guacamole-lite.test.ts
• npx prettier --check .
• npm run lint
• npx tsc --noEmit
• npm run build

Fixes Termix-SSH/Support#906

[LukeGus]

LGTM, thanks