Uses `_xvk_smoothing_excluded` field.
Surfaces can still be smoothed with a limited list of neightbours explicitly
by being included in a smoothing group.
Fixes#619
Use dedicated hash table for new material names.
Updates a lot of dependent code:
- surface patches now target materials, not textures:
`s/_xvk_textures/_xvk_material`
- patching now affects only materials, not texture ids. All logic that
depends on texture ids now operate on original textures.
- brush normal smoothing now ignores patched surface materials when
deciding whether two surfaces can be smoothed.
The rationale is that patching should only affect newer PBR/RT code paths.
- [x] Pass material reference via geom/render API
- [x] Show original textures for traditional renderer, #571
- [x] Remove old material type flags
- [x] ~~Move sky surfaces to a separate BLAS~~ Remove `SURF_DRAWSKY` from geometries completely #474
- [x] **REVERT** `SURF_DRAWSKY` changes. Such surfaces still need to be "drawn" to hide geometry behind it (see comments).
- [x] Chrome material: have an explicit material for it
- [x] This needs vk_texture vs vk_material index decoupling
- [x] Assess #577
- [x] Improve paths #578
- [x] `pbr/maps/c0a0a.bsp/c0a0a.bsp.mat` -> `pbr/maps/c0a0a.bsp/c0a0a.mat`
- [x] `pbr/halflife.wad/halflife.wad.mat` -> `pbr/halflife.wad/halflife.mat`
- [x] Rename files in PBR repo for the above
- [x] `luchiki/maps/c0a0.bsp.patch` -> `luchiki/maps/c0a0.patch`
- [x] Rename patch files too
- [x] Same for spr,mdl
- [x] Rename
- [x] Pass material mode directly, instead of render type
- [x] Advanced material patching/selection
- [x] Need a few advanced selection examples
- [x] #317
- [x] стёкла у костюма (??)
- [x] #526
- [x] #577
- [x] #213
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