Create compression tool

[pret]

Create compression tool

[ElectroDeoxys]

@dannye I think closing would be better, I can write up a new issue with the analysis I have done so far in terms of a matching compressor.

[jidoc01]

I've made a prototype of compressor for poketcg. And I built a simple benchmark tool which outputs the correctness and efficiency using the existing compressed binaries.

Total	N_ineff	N_eff	N_same	Avg. ineff
363	52	14	297	2

Total means the number of compressed binaries. N_ineff means the number of inefficiently compressed binaries, which have larger sizes than before. N_eff is the number of efficiently compressed binaries. N_same means the number of compressed binaries which have the same size as the original. And, Avg. ineff means the average size-overhead of inefficiently compressed binaries compared to their originals.

IMO, I can still further improve it with some known heuristics to achieve better efficiency (even smaller than the original like N_eff).

[jidoc01]

And I guess there is something wrong when decompressing border_intro_2.bin; our decompressor confronts an error when decompressing it. Maybe we could test it against the original algorithm running in an emulator.

[dannye]

@ElectroDeoxys Do you want to close this or use this for notes for working on a possible matching compressor?

[dannye]

Sounds good!