add PKGBUILD (testing)

PKGBUILD

@@ -0,0 +1,20 @@
+# Maintainer: Matt C <matt[at]getcryst[dot]al>
+pkgname=jade-gui
+pkgver=1.0.0
+pkgrel=1
+pkgdesc="Flutter GUI for installing crystal"
+arch=('any')
+url="https://git.tar.black/crystal/programs/jade_gui"
+makedepends=('flutter-group-pacman-hook' 'flutter')
+depends=('jade')
+source=("git+${url}.git")
+
+build() {
+    cd ${srcdir}/jade_gui
+    flutter build linux
+}
+
+package() {
+   mkdir -p ${pkgdir}/usr/bin
+   cp ${srcdir}/jade_gui/build/linux/x64/release/bundle/jade_gui ${pkgdir}/usr/bin/. 
+}