Added systemd cat unit.service output

[barbecued]

This allows ease of use when determining systemd unit files AND the drop-in files are included after the unit file if they exist.

This allows supportconfig to see exactly what the system sees in the systemd unit files instead of making assumptions based on the systemctl show output.

[barbecued]

Added commit to resolve:

#110

Supportconfig will pull lsinitrd based on symlink for /boot/initrd. Also added a check and warning if initrd does not match currently running kernel.

[Thr3d]

Made some small changes so it logs correctly, put inline with other systemctl commands, and moved the new warning to the top of the file where someone might see it.

On a side note, please keep unrelated/different changes in seperated by PR, base them on the dev branch, and target PRs for the dev branch.

boot.txt
#==[ Command ]======================================#
# /bin/uname -a
Linux testbox 6.4.0-150700.53.28-default #1 SMP PREEMPT_DYNAMIC Tue Jan 13 15:39:27 UTC 2026 (041a763) x86_64 x86_64 x86_64 GNU/Linux

Current running kernel matches /boot/initrd

**WARNING -- MISMATCH**: Running kernel DOES NOT match version of /boot/initrd-6.4.0-150700.53.28-default
This could be due to a different kernel installed but not rebooted, booted to a different kernel, chrooted in rescue, or other cause.