refactor: remove finch conversion, support zstd and lzma in wasm #6340

Job	Run time
Check	43s
test_all_features	9m 4s
test (beta)	1m 45s
test (stable)	1m 53s
coverage	8m 2s
test (windows)	4m 4s
Lints (beta)	49s
Check if wasm-pack builds a valid package for the sourmash crate	2m 2s
test (macos)	2m 1s
Lints (stable)	49s
Check if cbindgen runs cleanly for generating the C headers	5m 21s
minimum_rust_version	6m 18s
Publish (on tags, dry-run otherwise)	13m 3s
	55m 54s

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