Function createDitherFilter

createDitherFilter(
pal: DitherPair[],
ditherSize?: [number, number],
): PaletteFilter
Generates a PaletteFilter for processing 8-bit dither-pairs from raw render data of visual layer SCI-engine PIC assets into 4-bit dithered images.
Parameters
- pal: DitherPair[]
  256 dither-pairs.
- ditherSize: [number, number] = ...
  Dithering size, in pixels. Defaults to 1×1 pixel dither.
Returns PaletteFilter
Example
```
import { Dithers } from '@4bitlabs/color';
import { createDitherFilter } from '@4bitlabs/image';

// Generate a classic 1x1 EGA dither
const dither = createDitherFilter(Dithers.CGA);
const ouput = dither(visual);
```