Add README and MIT license

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

packaging/arch/PKGBUILD

@@ -3,7 +3,7 @@ pkgver=0.1.0
 pkgrel=1
 pkgdesc="Integrate AppImages, binaries and scripts into the application menu via the Thunar context menu"
 arch=('x86_64')
-license=('unknown')
+license=('MIT')
 depends=('gcc-libs' 'glibc')
 makedepends=('cargo')
 optdepends=(
@@ -33,4 +33,5 @@ build() {
 package() {
   install -Dm755 "$srcdir/target/release/ratbin" "$pkgdir/usr/bin/ratbin"
   install -Dm644 "$_root/assets/ratbin.desktop" "$pkgdir/usr/share/applications/ratbin.desktop"
+  install -Dm644 "$_root/LICENSE" "$pkgdir/usr/share/licenses/$pkgname/LICENSE"
 }