* add accessibility support for run_archiso and the releng profile
* remove build.sh functionality from profiles
* add documentation on how to create profiles
* enable non-mkinitcpio based hosts to build images
* extend profiledef.sh by settings for image type and image creation options
* ensure to be able to re-run more steps
* do not require root for mkarchiso help output
* add squashfs-tools and udftools to the releng profile
* add basic bootloader capabilities for UEFI to the baseline profile
* update mkinitcpio.conf to be in sync with mkinitcpio 29
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