CodeIgniter 4 Playground

@John_Betong SQLite3 is the default driver because it is the fastest and easiest way for a developer to get the code and run it - no need to have or install a database (assuming SQLite3 is available). Developers certainly can still switch the database, either via .env or app/Config/Database.php

@muuucho a full CRUD is high on the priority list! I'd like to see a few different versions, including a RESTful presenter (and eventual controller API) and "classic" methods. Probably add some more database tables too so we can do some example relationship handling and have other options for entities, arrays, and objects.