PSD parser in pure Odin. With many thanks for the intial code from jharler.

• Parse PSD layer info.

  • Layer Name
  • Layer id
  • Group
  • Blending mode

• Get PSD layer image data as byte array

  • Handles 3 channel and 3 + alpha layers
  • Correctly decodes RLE layers
  • Merged RGBA layers into single R8G8B8A8 byte array of pixels.

```odin
	psd_info := psd_odin.load_file_from_memory(fileData);
```

Now the PSD has layer info and document info. Crucially this step doesnt parse all the image data. Do this as a seperate call per layer.

	for layer in psd_info.layers {
		// file data is the byte array of the file from disk.
		psd_odin.psd_create_layer_image(layer, psd_info.file_header.height_in_pixels, psd_info.file_header.height_in_pixels, fileData);
	}

The layer will now have its .composited_image slice populated with the pixel array.

This library doesn't handle blending layers together.