Add blob_boot.sh to update boot splash image with GRUB/mkinitcpio compatibility

scripts/blob_boot.sh

@@ -0,0 +1,28 @@
+#!/bin/bash
+
+# Default to the branding image if no argument is provided
+if [ -z "$1" ]; then
+    IMAGE_PATH="$HOME/Documents/dotfiles/branding/boot_flash.png"
+else
+    IMAGE_PATH=$(realpath "$1")
+fi
+
+if [ ! -f "$IMAGE_PATH" ]; then
+    echo "Error: File '$IMAGE_PATH' does not exist."
+    exit 1
+fi
+
+echo "Applying boot splash image: $IMAGE_PATH"
+echo "This requires sudo privileges."
+
+# Copy the image to the Plymouth theme directory
+sudo cp "$IMAGE_PATH" /usr/share/plymouth/themes/omarchy/logo.png
+
+# Ensure the correct permissions
+sudo chmod 644 /usr/share/plymouth/themes/omarchy/logo.png
+
+echo "Rebuilding initramfs..."
+# Exclusively use mkinitcpio for GRUB compatibility
+sudo mkinitcpio -P
+
+echo "Boot splash successfully updated!"