[New Package] pakitheme (#5159)

* [New Package] pakitheme

* Update pakitheme.rb

packages/pakitheme.rb

+require 'package'
+
+class Pakitheme < Package
+  description 'Automatically install your host GTK+ theme as a Flatpak'
+  homepage 'https://github.com/refi64/pakitheme'
+  version '1.0'
+  compatibility 'all'
+  source_url 'https://github.com/saltedcoffii/pakitheme/archive/1.0.tar.gz'
+  source_sha256 '32446ecc73ae95d699d6e14e5fa3dc3a8b3a9cfae02457b2b7f38fdd7d7524f3'
+  
+  depends_on 'flatpak'
+
+  def self.install
+    system "install -Dm755 ./pakitheme #{CREW_DEST_PREFIX}/bin/pakitheme"
+  end
+end