[split] CI4 vs CI3/CI2

The main differences seem to be some syntax, resources are now loaded differently - instead of $this->load->model() you'd now use use mymodel/mymodel and views use single function, not $this->load->view().

But biggest change for me, where I had to build similar thing for v3 myself, is Entities that extend/add to Models - https://bcit-ci.github.io/CodeIgniter4/d...ities.html

It'll basically make it much easier to load and save data from DB, instead of you having to write same functions for every single model yourself.