Debounce the clipboard restore so the user's clipboard is never written
back while a just-pasted Vietnamese word may still be read by the target
app, which caused old clipboard content to appear in the text mid-typing.
Applied to both vietc-uinputd and the in-process UinputInjector.
Add a GitHub Actions workflow that builds the .deb and AppImage on the
runner (artifacts on push/PR, GitHub Release on v* tags), and include
vietc-uinputd + vietc-xrecord in the .deb.
Co-Authored-By: vndangkhoa <vonguyendangkhoa@gmail.com>
