Make start address more visible

[m-mueller678]

I have been debugging the kernel with gdb a lot recently. A few days ago I have made the kernel start address much more prominent and I find it has improved my workflow a lot. I am using this for both the initial address printing in boot_processor_main, and a second time in initd right before jumping into the application.

fn print_kenrnel_address_banner() {
	info!(
		"\n\
\x1b[1;31m####################################################\x1b[0m\n\
\x1b[1;31m====================================================\x1b[0m\n\
\x1b[1;36m>>>  KERNEL STARTS AT ADDRESS:\x1b[0m \x1b[1;35m    {:p}    \x1b[0m\n\
\x1b[1;31m====================================================\x1b[0m\n\
\x1b[1;31m####################################################\x1b[0m",
		env::get_base_address()
	);
}

I think this might be too prominent to be the default, but I think it is handy enough for gdb users to have some easy way to enable this, maybe with an option on the kernel command line .