feat: init bfstm (wip)

[kenrick95]

Support for BFSTM #9

Still a work in progress

Resources:

• https://mk8.tockdom.com/wiki/BFSTM_(File_Format)
• https://github.com/libertyernie/brawltools

[ic-scm]

Nice to see that you're working on this, I was never comfortable enough with Javascript to attempt this myself.

BCSTM should also be added to the same module as a supported format. It is almost identical to the BFSTM format and only has very minor differences. It shouldn't require much more work and it would be a bit of a waste to release the decoder without BCSTM reading functionality.
Openrevolution uses the same function in its code for decoding both BCSTM and BFSTM files.

https://www.3dbrew.org/wiki/BCSTM