ci: build and test every PR, release on tags, and add AUR packages (#15)

Co-authored-by: Tri Vo Khac <git@trivk.dev>

packaging/aur/qtpotato/PKGBUILD

@@ -0,0 +1,33 @@
+# Maintainer: Tri Vo Khac
+
+pkgname=qtpotato
+pkgver=0.1.0
+pkgrel=1
+pkgdesc='KDE video player built on mpv that translates subtitles with an LLM'
+arch=('x86_64')
+url='https://git.trivk.dev/tri/QtPotato'
+license=('GPL-3.0-or-later')
+depends=('qt6-base' 'qt6-declarative' 'kirigami' 'ki18n' 'kcoreaddons' 'kcrash' 'kconfig'
+         'mpvqt' 'qcoro' 'qtkeychain-qt6' 'ffmpeg' 'hicolor-icon-theme')
+makedepends=('cmake' 'ninja' 'extra-cmake-modules')
+optdepends=('qqc2-desktop-style: Plasma look for the interface'
+            'plasma-integration: Plasma file dialogs, colours and icons')
+source=("$url/releases/download/v$pkgver/$pkgname-$pkgver.tar.gz")
+# Filled in by update-pkgbuild.sh from the release's SHA256SUMS.
+sha256sums=('SKIP')
+
+build() {
+  cmake -B build -S "$pkgname-$pkgver" -G Ninja \
+    -DCMAKE_BUILD_TYPE=None \
+    -DCMAKE_INSTALL_PREFIX=/usr \
+    -DBUILD_TESTING=ON
+  cmake --build build
+}
+
+check() {
+  QT_QPA_PLATFORM=offscreen ctest --test-dir build --output-on-failure
+}
+
+package() {
+  DESTDIR="$pkgdir" cmake --install build
+}