Proposal: Add NamedGet and NamedSelect Methods to sqlx

[hirasawayuki]

Proposal:
I propose the addition of two new methods, NamedGet and NamedSelect, to the sqlx library. These methods would work similarly to their counterparts but would allow for the use of named parameters, enhancing consistency and usability for developers who prefer or require named parameters in their queries.

Looking forward to hearing your thoughts and feedback on this proposal.

[uvulpos]

Sounds like an idea to me, we could do. But then we would need documentation for this. So we need a follow-up issue to set up gh-pages with the documentation and update it.