Draft: feat: OpenGL Dynamic Lighting

requires !1854 (merged)

This merge request aims to bring dynamic lighting back to SRB2's OpenGL renderer using a much cleaner implementation. The old corona code is unfortunately too messy to be worth trying to revive. As such a new system is being written from scratch.

Old code cleanup:

• Disable old corona code
• Remove old deh_soc.c code for corona defs
• Remove old lighting menu
• remove hw_lights.h and hw_lights.c completely
• Remove remaining traces of #ifdef ALAM_LIGHTING code

Reimplementation progress:

• Basic sprite lights
• Wall lighting
• Plane lighting
• CVars
• Video Settings menu
• Lua support
• SOC support
• Custom shader support

Possible new additions (I MAKE NO PROMISES ON ANY OF THESE):

• Software support (I am not knowledgeable enough in software so I'd need help here)
• Dynamic lighting on models
• GZDoom gldefs port