Add support for custom error handling

[ItsMeBrianD]

Describe the feature

When using subcommands, it would be nice to have error handling bubble up, much like setup and cleanup

Additional information

• Would you be willing to help implement this feature?

[zzhenryquezz]

An ideia would be rethrow the error in this line:

citty/src/main.ts

Lines 34 to 36 in fea15c4

	if (!isCLIError) {
	consola.error(error, "\n");
	}

This way:

 if (!isCLIError) { 
   throw error; 
 } 

And then we can handle the error in the main script:

 runMain(main).catch((err) => { 
     // handle error
})