Add ability to use Pi 5

[ankonaskiff17]

Sorry about bold. i have tried to correct to no success
**Please add Pi 5 as appropriate for last line. Not sure if lacking Pi 5 would cause installation to fail or not but currently only options Pi 3 & 4

JSON sniplet Setup

NOTE: Please see all config files for setup variables!!!

shellcheck disable=SC2034

JSON_SUPPORTED_SBC="pi3-64bit pi4-64bit"

[meteyou]

raspberry pi5 needs bookworm. right now, mainsail only use debian bullseye. so when we add pi5, it will not boot on a pi5.

[keefo]

Backup on this request.

This doc says the debian bookworm is ready for pi5.
https://qengineering.eu/bookworm.html

[meteyou]

@keefo sry... I miswritten the post before. MainsailOS use bullseye.