Compile shaders in sokol's annotated GLSL format

Usage:
  v shader [options] [DIRECTORY / FILE]

Compile shaders in sokol's annotated GLSL format to C headers for use with
sokol based apps. Sokol based apps include all apps using V's gg module.

Examples:
  v shader .
  v shader examples/sokol/02_cubes_glsl/cube_glsl.glsl

Options:
  -h, --help                      Show this help text.
  -v, --verbose                   Be verbose about the tools progress.
  -u, --force-update              Force update of the sokol-shdc tool.
  -l, --slang <multiple strings>  Shader dialects to generate code for.
                                  Default is all.
                                  Available: 'glsl330', 'glsl100',
                                  'glsl300es', 'hlsl4', 'hlsl5',
                                  'metal_macos', 'metal_ios', 'metal_sim',
                                  'wgpu'