Walkthrough for raspberry pi and bookworm

**Is your feature request related to a problem? Please describe.** I am frustrated to not beeing able to install and use v4l2rtspserver on old rPi2 and rPi-camera as easily as before. Libcamera is now the default (#283 won't be fixed) and I'm struggling to find how to enable old camera driver/api while staying on bookworm (because old OSes are meant to be unsupported at some point). Should I ditch my hardware ? There a similar question in discussion (#339) without answer. This is not a request for a change in v4l2rtspserver, but a howto to make bookworm work like before. **Describe the solution you'd like** Has anyone had success in running v4l2rtspserver on raspberry pi / raspi camera / bookworm(debian12) ? Should we be limited to bullseye(debian11) ? Thanks **Describe alternatives you've considered** A lot of tries with poorly documented transition between APIs. Specifically I don't have the camera menu in the raspi-config tool.