WASM: add support for mnemonics #2545

# to view logs

Job	Run time
Check Rust	7m 2s
Vet Dependencies	2m 55s
Test ironfish-rust (1/2)	6m 15s
Test ironfish-rust (2/2)	5m 53s
Lint Rust	1m 23s
Test ironfish-rust (all features) (1/2)	3m 1s
Test ironfish-rust (no default features) (1/2)	50s
Test ironfish-rust (all features) (2/2)	3m 6s
Test ironfish-rust (no default features) (2/2)	49s
Test ironfish-rust-wasm	1m 37s
Test ironfish-zkp	51s
	33m 42s

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