feat: add post-install instructions for keyboard shortcut setup

- Add sniptext.install with clear setup instructions
- Display recommended keybind (Ctrl+Alt+T) after installation
- Include examples for Hyprland, Sway, i3, GNOME, and KDE
- Update PKGBUILD to reference install script

.SRCINFO

@@ -3,6 +3,7 @@ pkgbase = sniptext
 	pkgver = 0.1.1
 	pkgrel = 1
 	url = https://github.com/dkorbelainen/sniptext
+	install = sniptext.install
 	arch = any
 	license = MIT
 	makedepends = python-build

PKGBUILD

@@ -6,6 +6,7 @@ pkgdesc="Screen capture OCR tool with adaptive ensemble recognition"
 arch=('any')
 url="https://github.com/dkorbelainen/sniptext"
 license=('MIT')
+install=sniptext.install
 depends=(
     'python'
     'python-numpy'

sniptext.install

@@ -0,0 +1,32 @@
+post_install() {
+    echo ""
+    echo "========================================================================"
+    echo "  SnipText OCR - Installation Complete"
+    echo "========================================================================"
+    echo ""
+    echo "  REQUIRED: Configure a keyboard shortcut to use SnipText!"
+    echo ""
+    echo "  Recommended keybind: Ctrl+Alt+T"
+    echo "  Command to run: sniptext --capture-now"
+    echo ""
+    echo "  Configuration examples:"
+    echo ""
+    echo "  Hyprland (~/.config/hypr/hyprland.conf):"
+    echo "    bind = CTRL ALT, T, exec, sniptext --capture-now"
+    echo ""
+    echo "  Sway/i3 (~/.config/sway/config or ~/.config/i3/config):"
+    echo "    bindsym Ctrl+Alt+t exec sniptext --capture-now"
+    echo ""
+    echo "  GNOME: Settings → Keyboard → Custom Shortcuts"
+    echo "  KDE: System Settings → Shortcuts → Custom Shortcuts"
+    echo ""
+    echo "  Test from terminal: sniptext --capture-now"
+    echo "  Documentation: /usr/share/doc/sniptext/README.md"
+    echo ""
+    echo "========================================================================"
+    echo ""
+}
+
+post_upgrade() {
+    post_install
+}