WASM: add bindings for `Proof` #2568

# to view logs

Job	Run time
Check Rust	7m 1s
Vet Dependencies	2m 48s
Test ironfish-rust (1/2)	6m 26s
Test ironfish-rust (all features) (1/2)	4m 24s
Test ironfish-rust (no default features) (1/2)	2m 3s
Test ironfish-rust (all features) (2/2)	4m 13s
Test ironfish-rust (2/2)	6m 7s
Test ironfish-rust (no default features) (2/2)	2m 3s
Test ironfish-rust-wasm	2m 7s
Test ironfish-zkp	2m 10s
Lint Rust	1m 18s
	40m 40s

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