Added slug utility function

[guilty-p01nt3r]

I needed getUrlWithoutLocale and getLocale but for slugs instead of URL

[jlarmstrongiv]

Sure, I thought the use-case would be with the built-in Astro url objects. But, supporting regular url paths would be good too. Rather than make three new functions, I think we can add support to the three existing functions:

• getLocale
• getUrlWithoutLocale
• getLocaleUrlPrefix

After all, we’re just pulling the url.pathname string from the url anyway.

However, I would like to have strong type safety with these functions and strings. If I pass in a constant of /en/about to getLocale, I should get the type en back, not the type string.

It should support the regular URL object, as well as paths like:

• /es/about
• es/about
• /about
• about
• ../about
• /enigma (starts with a locale like /en)
• enigma

When you’ve updated your PR, I’ll be glad to review and merge it 😄

[jlarmstrongiv]

Added in 0.3.5