Review crate READMEs

[outoftardis]

Review existing readmes:

• cli ([documentation] #2193: Update Iroha CLI documentation #2244 )
• wasm ([documentation] #2193: Update README for wasm crate #2240)
• macro ([documentation] #2193: Update README for macro crate #2236)
• client ([documentation] #2193: Update Iroha Client and Iroha CLI Client documentation #2234)
• client_cli ([documentation] #2193: Update Iroha Client and Iroha CLI Client documentation #2234)
• tools/kagami ([documentation] #2193: Update Kagami documentation #2220 )
• client/benches/tps ([documentation] #2193: Update benchmarks documentation #2230)
• tools/parity_scale_decoder ([documentation] #2193: Update Parity Scale Decoder Tool documentation #2224)