Add a bash script to generate a desktop launcher

setup/appimage_launcher.sh

@@ -0,0 +1,36 @@
+#!/bin/bash
+
+if [ -z "$1" ]; then
+  echo "Please provide the path to the novelWriter.AppImage file as an argument"
+  exit 1
+fi
+
+if [ ! -e "$1" ]; then
+  echo "File not found"
+  exit 1
+fi
+
+IMGPATH="$(readlink -m "$1")"
+echo "AppImage: $IMGPATH"
+
+ICONPATH="$(dirname "$IMGPATH")/novelWriter.png"
+
+if [ ! -e "$ICONPATH" ]; then
+  echo "Downloading icon"
+  wget https://raw.githubusercontent.com/vkbo/novelWriter/main/setup/data/hicolor/256x256/apps/novelwriter.png -O "$ICONPATH"
+fi
+
+cat > $HOME/.local/share/applications/novelWriter.desktop <<EOF
+[Desktop Entry]
+Type=Application
+Name=novelWriter
+Comment=A markdown-like text editor for planning and writing novels
+Exec=${IMGPATH} %f
+Icon=${ICONPATH}
+Categories=Qt;Office;WordProcessor;
+Terminal=false
+EOF
+
+update-desktop-database ~/.local/share/applications
+
+echo "Desktop launcher generated"