Component count for texture formats was (accidentally?) removed from wgpu types

[Elabajaba]

Introduced in #2020, it was dropped in #3436.

[teoxoy]

wgpu code was not using it so, I wasn't sure if it was worth keeping around.
I remember looking at the history but it seems I somehow missed #2020.

If this is blocking people, I can go ahead and add it back tomorrow.

Sorry for this, I should have asked if people were relying on this.

[Elabajaba]

rend3 was using it, so I added it as a function there.

pub(crate) fn components(format: TextureFormat) -> u8 {
    match format {
        TextureFormat::R8Unorm => 1,
        TextureFormat::R8Snorm => 1,
        TextureFormat::R8Uint => 1,
        TextureFormat::R8Sint => 1,
        TextureFormat::R16Uint => 1,
        TextureFormat::R16Sint => 1,
        TextureFormat::R16Unorm => 1,
        TextureFormat::R16Snorm => 1,
        TextureFormat::R16Float => 1,
        TextureFormat::R32Uint => 1,
        TextureFormat::R32Sint => 1,
        TextureFormat::R32Float => 1,
        TextureFormat::Rg8Unorm => 2,
        TextureFormat::Rg8Snorm => 2,
        TextureFormat::Rg8Uint => 2,
        TextureFormat::Rg8Sint => 2,
        TextureFormat::Rg16Uint => 2,
        TextureFormat::Rg16Sint => 2,
        TextureFormat::Rg16Unorm => 2,
        TextureFormat::Rg16Snorm => 2,
        TextureFormat::Rg16Float => 2,
        TextureFormat::Rg32Uint => 2,
        TextureFormat::Rg32Sint => 2,
        TextureFormat::Rg32Float => 2,
        TextureFormat::Rg11b10Float => 3,
        TextureFormat::Rgb9e5Ufloat => 3,
        TextureFormat::Rgba8Unorm => 4,
        TextureFormat::Rgba8UnormSrgb => 4,
        TextureFormat::Rgba8Snorm => 4,
        TextureFormat::Rgba8Uint => 4,
        TextureFormat::Rgba8Sint => 4,
        TextureFormat::Bgra8Unorm => 4,
        TextureFormat::Bgra8UnormSrgb => 4,
        TextureFormat::Rgb10a2Unorm => 4,
        TextureFormat::Rgba16Uint => 4,
        TextureFormat::Rgba16Sint => 4,
        TextureFormat::Rgba16Unorm => 4,
        TextureFormat::Rgba16Snorm => 4,
        TextureFormat::Rgba16Float => 4,
        TextureFormat::Rgba32Uint => 4,
        TextureFormat::Rgba32Sint => 4,
        TextureFormat::Rgba32Float => 4,
        TextureFormat::Stencil8 => 1,
        TextureFormat::Depth16Unorm => 1,
        TextureFormat::Depth24Plus => 1,
        TextureFormat::Depth24PlusStencil8 => 2,
        TextureFormat::Depth32Float => 1,
        TextureFormat::Depth32FloatStencil8 => 2,
        TextureFormat::Bc1RgbaUnorm => 4,
        TextureFormat::Bc1RgbaUnormSrgb => 4,
        TextureFormat::Bc2RgbaUnorm => 4,
        TextureFormat::Bc2RgbaUnormSrgb => 4,
        TextureFormat::Bc3RgbaUnorm => 4,
        TextureFormat::Bc3RgbaUnormSrgb => 4,
        TextureFormat::Bc4RUnorm => 1,
        TextureFormat::Bc4RSnorm => 1,
        TextureFormat::Bc5RgUnorm => 2,
        TextureFormat::Bc5RgSnorm => 2,
        TextureFormat::Bc6hRgbUfloat => 3,
        TextureFormat::Bc6hRgbFloat => 3,
        TextureFormat::Bc7RgbaUnorm => 4,
        TextureFormat::Bc7RgbaUnormSrgb => 4,
        TextureFormat::Etc2Rgb8Unorm => 3,
        TextureFormat::Etc2Rgb8UnormSrgb => 3,
        TextureFormat::Etc2Rgb8A1Unorm => 4,
        TextureFormat::Etc2Rgb8A1UnormSrgb => 4,
        TextureFormat::Etc2Rgba8Unorm => 4,
        TextureFormat::Etc2Rgba8UnormSrgb => 4,
        TextureFormat::EacR11Unorm => 1,
        TextureFormat::EacR11Snorm => 1,
        TextureFormat::EacRg11Unorm => 2,
        TextureFormat::EacRg11Snorm => 2,
        TextureFormat::Astc { block, channel } => todo!(),
    }
}