sfx and lztreasure compressions already reversed

[77ZaRR772]

https://github.com/sonicretro/smps-rips/tree/master/68k/Alien%20Soldier
Great people there already done the work.
Need to somehow apply it to the project.

Also this project has Alien Soldier mention too
https://github.com/hansbonini/sega2asm

[oranguthang]

Thanks for the references! I've integrated the applicable sound-driver work into the project: SFX and music mappings, sound command handlers, envelope and pan tables, plus documentation and attribution.

I did not port anything for LZTreasure because the referenced repository only contains a decompressor, not a compressor. Its decompression logic is also functionally equivalent to the decoder already present in this project, so I left our implementation unchanged.