add install target to build script

pxl8.sh

@@ -104,6 +104,7 @@ print_usage() {
     echo "    build        Build pxl8"
     echo "    clean        Remove build artifacts"
     echo "    help         Show this help message"
+    echo "    install      Install pxl8 to ~/.local/bin"
     echo "    run          Build and run pxl8 (optional: cart.pxc or folder)"
     echo "    update       Download/update all dependencies"
     echo "    vendor       Fetch source for dependencies (ex. SDL3)"
@@ -468,6 +469,22 @@ case "$COMMAND" in
         update_sdl
         ;;
 
+    install)
+        "$0" build --release || exit 1
+
+        INSTALL_DIR="${HOME}/.local/bin"
+        mkdir -p "$INSTALL_DIR"
+
+        cp "bin/release/pxl8" "$INSTALL_DIR/pxl8"
+        chmod +x "$INSTALL_DIR/pxl8"
+
+        print_info "Installed pxl8 to $INSTALL_DIR/pxl8"
+
+        if [[ ":$PATH:" != *":$INSTALL_DIR:"* ]]; then
+            print_info "Note: Add $INSTALL_DIR to your PATH if not already"
+        fi
+        ;;
+
     ase)
         bash tools/aseprite/pxl8-ase.sh "$@"
         ;;