Extract embedded text from Dockerfiles and workflows to separate files

Co-authored-by: johndoe6345789 <224850594+johndoe6345789@users.noreply.github.com>

config/image-release-readme.txt

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+SparkOS UEFI-Bootable Disk Image
+==================================
+
+This package contains a UEFI-bootable disk image with SparkOS.
+
+Files:
+- sparkos.img.gz - Compressed UEFI-bootable disk image (~1GB)
+
+What's Included:
+---------------
+✓ GPT partition table
+✓ EFI System Partition (ESP) with FAT32 filesystem
+✓ GRUB UEFI bootloader
+✓ Linux kernel
+✓ SparkOS init system
+✓ Busybox utilities
+✓ Basic FHS-compliant filesystem structure
+
+Boot Support:
+------------
+✓ UEFI boot (x86_64 systems)
+✓ Automatic boot after 3 seconds
+✓ Console on tty1
+
+Quick Start:
+-----------
+
+1. Decompress the image:
+   gunzip sparkos.img.gz
+
+2. Write to USB drive (Linux - BE CAREFUL!):
+   sudo dd if=sparkos.img of=/dev/sdX bs=4M status=progress oflag=sync
+   
+   WARNING: Replace /dev/sdX with your actual USB drive device.
+            This will DESTROY all data on the target drive!
+
+3. Boot from USB:
+   - Insert the USB drive into a UEFI-capable system
+   - Enter BIOS/UEFI settings (usually F2, F12, DEL, or ESC at boot)
+   - Select the USB drive as boot device
+   - SparkOS should boot automatically
+
+Advanced - Inspect Partitions:
+------------------------------
+
+To mount and inspect the partitions:
+
+# Set up loop device
+sudo losetup -fP --show sparkos.img
+# Note the loop device name (e.g., /dev/loop0)
+
+# Mount ESP (EFI System Partition)
+sudo mount /dev/loop0p1 /mnt
+ls -la /mnt/EFI
+sudo umount /mnt
+
+# Mount root partition
+sudo mount /dev/loop0p2 /mnt
+ls -la /mnt
+sudo umount /mnt
+
+# Cleanup
+sudo losetup -d /dev/loop0
+
+Documentation:
+-------------
+See the full documentation at:
+https://github.com/johndoe6345789/SparkOS
+
+Support:
+-------
+For issues and questions, visit:
+https://github.com/johndoe6345789/SparkOS/issues