Allow specifying the name of the typescript declaration file

[bakerkretzmar]

Allows passing a value to the --types command option to put the types at a custom path instead of resources/js/ziggy.d.ts. This is a bandaid solution for the 'module has no exported member Ziggy' issue, which I believe really does just boil down to the files being named the same, which they shouldn't be. I think changing the default name is a breaking change though, so adding this in the meantime.

To fix the issue described in #828, #829, and #826, use --types=resources/js/ziggy-routes.d.ts in your commands (or another path that is not resources/js/ziggy.d.ts).

The default in the command signature is "false" to remain compatible with existing command usage that either:

• doesn't pass the --types option at all (in which case the command will now see "false" and not generate types)
• passes --types just like that, with no value (in which case the command will see it as null and generate types at the default location)

Closes #828.