Add a template for a web app with no database

[stephendolan]

It'd be nice to have an option for lucky init.custom that would build you a website without a database.

We've got a few examples in the Lucky website itself and LuckyDiff: https://github.com/luckyframework/website https://github.com/stephendolan/lucky_diff

[jwoertink]

I think I want to wait on this until we have a full solution with https://github.com/luckyframework/lucky/discussions/1812

That may change how this feature gets added in