Using Json as an example for custom datatype can be misleading

[MolbioUnige]

Issue Description

Using Json as an example for the custom type might make people think that Cakephp doesn't handle json natively. I found it a bit confusing. Instead, having a section explaining how to use the native JsonType, like the EnumType, would be nice.

[LordSimal]

Isn't this enough? https://book.cakephp.org/4/en/orm/saving-data.html#saving-complex-types

[jamisonbryant]

I think what @MolbioUnige might be referring to is that Cake now ships with the JsonType, whereas I don't believe that was always the case. So, users might read these docs and create their own JsonType, not realizing that Cake already has one and their efforts were redundant. At $MYJOB we ran into this ourselves in a recent project.

I think documenting EnumType in place of JsonType (perhaps with a notice that JsonType is already part of Cake) is a good choice because many PHP8 users, myself included, are eager to see an example of its usage.

[LordSimal]

Then it would be best if we'd come up with another, not so straight forward example of a custom Database Type to replace the currently redundant JsonType

[MolbioUnige]

There is the PointType example already, and yes @LordSimal the saving complex type explanation is enough

[MolbioUnige]

A link "see Saving complex datatype" at some place along with @jamisonbryant suggestion about stating that Json is natively supported could be useful.