QBSP support (for extended limits)

[Paril]

This needs testing, and some back&forth with qbism (see qbism/q2tools-220#11) who has been implementing an "extended limits" format similar to BSP2 into their compiler.

I did test the load in q2pro itself, and it seemed to work, although obviously network limitations need to be addressed separately and that's not in the scope of this push since that requires breaking compatibility.

[motorsep]

Tried compiling this code using Paril's Q2RTX forks https://github.com/Paril/Q2RTX/tree/extended_limits (which is the same thing basically)
I enabled extended limits and qbsp code by adding #define EXTENDED_LIMITS to #if USE_CLIENT block in inc/shared/config.h, but I get this error:

13>F:\Games\Q2RTX\src\refresh\vkpt\shader/global_ubo.h(241,1): fatal error C1189: #error: need to update constant here
13>bloom.c
13>F:\Games\Q2RTX\src\refresh\vkpt\shader/global_ubo.h(241,1): fatal error C1189: #error: need to update constant here
13>bsp_mesh.c
13>F:\Games\Q2RTX\src\refresh\vkpt\shader/global_ubo.h(241,1): fatal error C1189: #error: need to update constant here
13>freecam.c
13>F:\Games\Q2RTX\src\refresh\vkpt\shader/global_ubo.h(241,1): fatal error C1189: #error: need to update constant here
13>material.c
13>F:\Games\Q2RTX\src\refresh\vkpt\shader/global_ubo.h(241,1): fatal error C1189: #error: need to update constant here
13>matrix.c
13>F:\Games\Q2RTX\src\refresh\vkpt\shader/global_ubo.h(241,1): fatal error C1189: #error: need to update constant here
13>Generating Code...
13>Compiling...
13>mgpu.c
13>F:\Games\Q2RTX\src\refresh\vkpt\shader/global_ubo.h(241,1): fatal error C1189: #error: need to update constant here
13>path_tracer.c
13>F:\Games\Q2RTX\src\refresh\vkpt\shader/global_ubo.h(241,1): fatal error C1189: #error: need to update constant here
13>physical_sky.c
13>F:\Games\Q2RTX\src\refresh\vkpt\shader/global_ubo.h(241,1): fatal error C1189: #error: need to update constant here
13>precomputed_sky.c
13>F:\Games\Q2RTX\src\refresh\vkpt\shader/global_ubo.h(241,1): fatal error C1189: #error: need to update constant here
13>profiler.c
13>F:\Games\Q2RTX\src\refresh\vkpt\shader/global_ubo.h(241,1): fatal error C1189: #error: need to update constant here
13>shadow_map.c
13>F:\Games\Q2RTX\src\refresh\vkpt\shader/global_ubo.h(241,1): fatal error C1189: #error: need to update constant here
13>textures.c
13>F:\Games\Q2RTX\src\refresh\vkpt\shader/global_ubo.h(241,1): fatal error C1189: #error: need to update constant here
13>tone_mapping.c
13>F:\Games\Q2RTX\src\refresh\vkpt\shader/global_ubo.h(241,1): fatal error C1189: #error: need to update constant here
13>transparency.c
13>F:\Games\Q2RTX\src\refresh\vkpt\shader/global_ubo.h(241,1): fatal error C1189: #error: need to update constant here
13>uniform_buffer.c
13>F:\Games\Q2RTX\src\refresh\vkpt\shader/global_ubo.h(241,1): fatal error C1189: #error: need to update constant here
13>vertex_buffer.c
13>F:\Games\Q2RTX\src\refresh\vkpt\shader/global_ubo.h(241,1): fatal error C1189: #error: need to update constant here
13>vk_util.c
13>F:\Games\Q2RTX\src\refresh\vkpt\shader/global_ubo.h(241,1): fatal error C1189: #error: need to update constant here
13>buddy_allocator.c
13>device_memory_allocator.c
13>F:\Games\Q2RTX\src\refresh\vkpt\shader/global_ubo.h(241,1): fatal error C1189: #error: need to update constant here
13>god_rays.c
13>F:\Games\Q2RTX\src\refresh\vkpt\shader/global_ubo.h(241,1): fatal error C1189: #error: need to update constant here
13>conversion.c
13>Generating Code...
13>Done building project "client.vcxproj" -- FAILED.

:(