Expose brotli decompression to the scripting API.

[bruvzg]

Exposes brotli decompression it to the scripting API via new FileAccess.COMPRESSION_BROTLI CompressionMode constant (usable with any script function, which takes CompressionMode argument).

See #59522 (comment)

[bruvzg]

Encoder is quite slow and big, so not sure if it worth it, might be better to keep it as decode only.

[Calinou]

Encoder is quite slow and big, so not sure if it worth it, might be better to keep it as decode only.

Indeed, I'd make it decode-only as Brotli seems to have fallen out of fashion in favor of Zstandard lately. Brotli is mostly kept alive because it's part of HTTP2 specification and WOFF2. For high-level multiplayer API compression, the currently available choices seem to work well enough.

[bruvzg]

Changed it to decompression only (removed encoder and multiplayer API changes), compression benefits are small and encoder is 10 times slower than ZSTD so not worth it. Adding decompression support is reasonable since we have it for WOFF2 support anyway, so it's free.

[akien-mga]

Thanks!