feat: optionally return the type from parse wasm client type

[benluelo]

$ nix build .#tendermint-light-client

$ nix run .#parse-wasm-client-type -- result/lib/tendermint_light_client.wasm
Tendermint

$ nix run .#parse-wasm-client-type -- result/lib/tendermint_light_client.wasm Tendermint

$ echo $?
0

$ nix run .#parse-wasm-client-type -- result/lib/tendermint_light_client.wasm Cometbls
thread 'main' panicked at tools/parse-wasm-client-type/src/main.rs:20:43:
assertion `left == right` failed
  left: Tendermint
 right: Cometbls
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

$ echo $?
101