Adding packages to ubuntu-raspi-dev

[Dave Jones]

The "raspi" package set (used by the ubuntu-raspi-dev "team" [1]) was 
originally added so that I could maintain those packages specific to the 
Raspberry Pi, however it became rather moot after I attained MOTU 
rights, and has stagnated somewhat.

Now we have another developer (Pragyansh) who's about to apply for 
upload rights on Raspberry Pi related packages, I'd like to bring the 
set of packages up to date, so this his application can be judged 
against the actual set of packages he'll be maintaining.

At present (in questing), this package set contains:

* gpiozero
* lg-gpio
* linux-firmware-raspi
* linux-firmware-raspi2
* pi-bluetooth
* raspberrypi-userland
* raspi-config
* rpi-eeprom
* ubuntu-raspi-settings

The linux-firmware-raspi2 package can be removed from noble onwards 
(that renaming happened back in jammy). The raspberrypi-userland package 
is obsolete from plucky onwards (its replacement is raspi-utils) but 
probably shouldn't be removed until we've got an LTS with the 
transitional package in place. The pi-bluetooth package is also an empty 
transition package since noble. And, naturally, there's a bunch more 
packages we'd like to add (which are Raspberry Pi specific).

Please consider the following changes to be made to this package set 
(prefix indicating removal or addition) in noble onwards:

- linux-firmware-raspi2
- pi-bluetooth
+ rpi-imager
+ raspi-utils
+ rpicam-apps
+ libpisp
+ pidng
+ kms++
+ simplejpeg

The last two packages may not appear raspi-specific, but are actually 
from RaspiOS as dependencies of the (yet to be sponsored) picamera2 
package (which is, obviously, raspi-specific). Whether they would fit 
within the remit of the raspi package set, I am not sure (they should 
work to some degree on other platforms), but I include them as they will 
be packages Pragyansh will want to update in keeping picamera2 
maintained (once that is uploaded).

[1]: https://launchpad.net/~ubuntu-raspi-dev

Thanks for your consideration,

Dave Jones.