postmarketOS 23.12

Unlocking of encrypted installations is now done with unl0kr by default, the successor to osk-sdl. The default USB networking gadget was changed from RNDIS to NCM. The default image viewer in Phosh and GNOME is now Loupe, instead of previously Eye of GNOME (EoG). The release upgrade process has been made more robust. There are additional safety checks for a too small boot partition and for having hardcoded versions or packages installed via mrtest. Additionally a bug was fixed that caused Alpine mirrors without /alpine/ in the URL to not get properly replaced during the upgrade.