detectLocaleFromCookie helper

[DavidDeSloovere]

Clear and concise description of the problem

The Only default helper to resolve the locale is detectLocaleFromAcceptLanguageHeader. To get it from a cookie, one needs to write custom code.

Suggested solution

Implement a detectLocaleFromCookie helper

Alternative

Using custom function is already possible, but since there is a helper for accept-language already, more helpers make sense.

Additional context

No response

Validations

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• Read the Contributing Guide.
• Check that there isn't already an issue that request the same feature to avoid creating a duplicate.

[DavidDeSloovere]

I'd be happy to send a PR.

[kazupon]

Thank you for your feedback!

You are right, it would be more convenient for us if there was a helper.
However, in order to support this, it is necessary to support not only Cookies, but also Queries, and Paths.

see more ref:
https://github.com/intlify/h3#%EF%B8%8F-utilites--helpers

[DavidDeSloovere]

Not sure if you want me to do it. If so, I will need #25 first.