feat: add AppImage build support with desktop integration and packaging scripts

Implement AppImage packaging pipeline including desktop file generation, icon bundling, and AppStream metadata. The build script creates a portable Linux executable with automatic desktop integration using linuxdeploy and appimagetool. Key additions include the .desktop launcher file, application icon in multiple resolutions, and AppStream metainfo for software center compatibility. The packaging process compiles the application, bundles all runtime dependencies, and generates a self-contained AppImage binary in the dist/ directory.

collect_so_files.sh

@@ -0,0 +1,27 @@
+#!/bin/bash
+# Script: collect_so_files.sh
+
+BINARY="AppImage/usr/bin/r"
+LIB_DIR="AppImage/usr/lib"
+mkdir -p "$LIB_DIR"
+
+# Function to copy a library and its dependencies
+copy_with_deps() {
+    local lib="$1"
+    if [ -f "$lib" ] && [ ! -f "$LIB_DIR/$(basename "$lib")" ]; then
+        cp "$lib" "$LIB_DIR/"
+        echo "Copied: $lib"
+        # Recursively check dependencies of this library
+        ldd "$lib" | grep -o '/[^ ]\+' | while read -r dep; do
+            if [ -f "$dep" ]; then
+                copy_with_deps "$dep"
+            fi
+        done
+    fi
+}
+
+# Start with the binary’s dependencies
+ldd "$BINARY" | grep -o '/[^ ]\+' | while read -r lib; do
+    copy_with_deps "$lib"
+done
+