…hardwired per shader stage

… mandatory in all backends

…GSL)

…L and WGSL)

…simgui_imtextureid()

…n snk_nkhandle()

…aders)

…sampler instead of image-sampler-pair

…e warning)

handles.

On platforms with 32-bit pointers (e.g. WASM), the default
Dear ImGui and Nuklear texture handles are not wide enough
to store both a sokol-gfx image and sampler handle.

…i vs glSamplerParameterf for min/max lod

…-border)

…sc defaults

- new helper function _sg_miplevel_dim() to compute mip level
  width/height/depth
- replace all places where miplevel size with computed with
  _sg_miplevel_dim()
- set pass width/height upfront in _sg_pass_common_t
- bugfix: pass width/height was wrong when rendering to miplevel > 0

for #39, #40

Update zig bindgen produce source that matches "zig fmt" style

…lows depth textures to be sampled)

…lowed

warning:: `unsafeAddr` is a deprecated alias for `addr`,
use `addr` instead.

Bindgen updates for zig-0.11.0, and make bindgen output zig fmt compatible.

…ndings on macOS