Adding a warning to welcome screen

[Tearran]

Description

Added check_os_status compares /etc/armbian-distribution-status to os uses displays ok/exit window.
used the color module set_color 1

NOTE: manually changed /etc/armbian-distribution-status to bookworm= eos, tested, and csc for test.
Result

if = supported operates as normal

[Tearran]

to test commented out line for bookworm. /etc/armbian-distribution-status

[igorpecovnik]

Yeah, something like that.

[igorpecovnik]

Adjusted text a bit - check if it still sounds o.k.

Also there is some grep issue - on exit:

grep: : No such file or directory
User canceled. exiting

[Tearran]

Removed file "/etc/armbian-distribution-status" to replicate message.

grep: : No such file or directory
User canceled. exiting

This is happening on an unsupported os or a modified os ( such as I did to test it ) That is aso unsupported as I understand. IMO Fixing this error seems a little counter productive.

[igorpecovnik]

grep: : No such file or directory

I would suppress this error - we anyway show that conditions are not met with a big prompt.

[Tearran]

@igorpecovnik redirected grep: : No such file or directory to null

If User canceled. exiting is issue, Would like to addressed separately. note: its is part of get_user_continue and process_input.