Just increase point lights limit per light cell.
Also:
- update infotool to show point lights info
- move light cluster finalization to vk_scene to make sure infotool has
the recentmost data
Do not skip 0th leaf when iterating through R_FatPVS results.
Also:
- move infotool from camera.c to infotool.c
- add hit coords to infotool
- add limited light clusters info into infotool
- add a bit more debug info to light clusters
fixes#279