Forms: child blocks should be connected semantically so you can easily transform and change “type”

Internal reference p1HpG7-l0G-p2

> I think all the form child blocks should be connected semantically so you can easily transform and change their “type”. I imagine the switching to be similar to how we do block variation type switching, which is exposed prominently in the sidebar. It should be easy to switch a “date” field to an “email” field, and so on, in both transforms and the sidebar.

From core forms blocks:

Start by locating the core forms blocks and the existing block variation type-switching behavior. Compare how transforms and the sidebar expose switching, then define the semantic connections and confirm that date, email, and other child blocks can change type through both paths.

Written by the indexing model from the issue text.