feat: added 'create' option on CLI to create IMG from rootFS files

[abd3-13]

reworked to fit the organized structure of codebase.

Add image creation workflow for DroidSpaces

This change introduces ds_create_image() in create_img.c, it creates an ext4 root filesystem image from given archive.

What this does

• Creates a sparse disk image file
• Formats it as ext4
• Attaches it to a loop device
• Creates and mounts a temporary mount point
• Extracts the rootfs archive into the mounted image
• Syncs and cleans up loop device and mount point

Key components

• create_sparse_image() : initializes sparse image file
• attach_loop() / detach_loop() : manages loop device binding
• make_mount_point() : creates temporary mount directory
• extract_archive() : extracts tar-based rootfs into image
• ds_create_image() : orchestrates the full image build process

Notes
It Requires root privileges
It validates archive format before extraction
It Supports xz, gzip, bzip2, and tar archives

[ravindu644]

Sorry, the same is achievable using a simple shell script.

Droidspaces is just a container runtime that boots an already-extracted rootfs.