`sar_draw_world_collides` feature

[rudkoLA]

spt has a spt_draw_world_collides command which draws collisions including but not limited to worldspawn collision which is only really visible in hammer, would be useful in tas routing
here's an example of what it looks like

2024-12-27.15-05-21.mp4

[rudkoLA]

additionally I'd like for there to be a command to lock the brush you're currently looking at and to enable/disable the actual hover part of it