created clean VCS-based PKGBUILD following arch packaging conventions.
this explicitly marked as a rolling (-git) build and derives its version dynamically from git tags and commit history via pkgver(). previous hybrid approach has been changed.
key changes:
- use -git suffix to clearly indicate rolling source builds
- set pkgver=0 and compute the actual version via pkgver()
- build only a directory layout using electron-builder (--dir)
- avoid generating AppImage, deb, rpm, or pacman installers
- align build and package steps with Arch packaging guidelines
note: this PKGBUILD is intended for development and AUR use only and is not suitable for binary redistribution or release artifacts.
