✨ Implement LZSS decoder, LZSS encoder and RLE decoder

[pleonex]

Implement compression and decompression for some of the BIOS built-in compressions:

• LZSS: decompress and compress
• RLE: decompress

TODO:

• Unit tests for RLE
• Compression for RLE
• Update documentation (and README)

Part of #29

Quality check list

• Related code has been tested automatically or manually
• Related documentation is updated
• I acknowledge I have read and filled this checklist and accept the
  developer certificate of origin

Acceptance criteria

• Compress and decompress LZSS files.
• Compress and decompress RLE files

Follow-up work

• Implement Huffman compressions
• Implement BLZ compressions
• Implement LZ11 compression

Example

// Compress a Stream
var encoder = new LzssEncoder();
using Stream outputStream = encoder.Convert(inputStream);

// Or pass the output in the constructor
new LzssEncoder(outputStream).Convert(inputStream);

Same for the LZSS decompressor LzssDecoder or the RLE decompressor RleDecoder.