Use libcamera for image capture, more robust radio IC handling

[darksidelemm]

A few major changes in here:

• Move to using the newer libcamera api to control the camera. This adds support for PiCamv3, though these have focus drift issues with temperature, so are not recommended for flight.
• Abstract the radio control and modulation somewhat, and move radio initialisation into the main operating scripts (e.g. tx_picamera2_gps.py

Some minor changes to the RX webGUI:

• Add timestamps before received text messages.

This needs a lot of testing before I'll be willing to fly it on a launch!

[ke5gdb]

Everything seems to be going well with my test setup and this latest version. I do have a few notes, but they all pertain to documentation and configuration. These notes are from a Raspberry Pi OS Lite 64-bit install in a Pi 3.

NTP in Debian Bookworm is now ntpsec. The configuration file has moved to /etc/ntpsec/ntpsec.conf. This is a drop-in replacement for the old NTP that was available in previous releases.

To use the systemd-timedatectld (timedatectl), it needs to be made aware that ntpsec exists and is the NTP daemon of choice. Adding the unit file name to a specific file (per these instructions) will accomplish this. The impact of not doing this is that timedatectl set-ntp 1 or timedatectl set-ntp 0 will always error out, preventing the NTP sync from happening as designed.

sudo mkdir /etc/systemd/ntp-units.d
echo "ntpsec.service" | sudo tee /etc/systemd/ntp-units.d/80-systemd-timesync.list

When installing python3-picamera2, adding the --no-install-recommends is highly suggested. There are a lot of desktop related packages that it wants to install for live image preview, which defeats the purpose of the Lite version of the OS.

I believe that is all. I will comment again if I think of anything else.