Adds support for inspecting a hex encoded public key (#7344)

* Adds support for inspecting a hex encoded public key

This adds support for inspecting hex encoded public keys to subkey. The
command looks like:

`subkey inspect --public 0xPUBLICHEX`

* Update client/cli/src/commands/utils.rs

Co-authored-by: André Silva <123550+andresilva@users.noreply.github.com>

Co-authored-by: André Silva <123550+andresilva@users.noreply.github.com>

substrate/client/cli/src/commands/generate.rs

@@ -70,7 +70,7 @@ impl GenerateCmd {
 				mnemonic.phrase(),
 				password,
 				self.network_scheme.network.clone(),
-				output
+				output,
 			)
 		);
 		Ok(())