Generator Prefixes should use different string helpers

[billysmithers]

The GeneratorPrefixes class for merging namespace prefix is using Str::title it should be Str::studly.

The route prefix for merging is using Str::camel, IMHO it should be Str::kebab - I would expect semantic URLs to be in kebab case not in camel case.

The view prefix for merging is using Str::snake it should be Str::kebab in line with Laravel convention I would expect these to be in kebab case also.

I'm happy to submit a PR as I have written a proof of concept to verify the changes do as would be expected.

[billysmithers]

PR here - #1070