Is it possible to have a new field called section, able to customize the way it is layout.

[taoguangc]

It can create a container, similar to raw in bootstrap, it can specify the internal layout.
Just like some visual editor, e.g. elementor.

For complex pages this is very helpful!

[edalzell]

Yes there are a few examples in the marketplace, like this one: https://statamic.com/addons/rias/position-fieldtype