Improve element and property type information

[Edward-Upton]

There's two main ideas for this improvements

Improve Element types

TypeScript doesn't seem to cope well with there being set fields and extra optional ones in elements. This can be fixed by moving to two fields in elements; atts and optAtts. atts contains the required, default attributes like title, coverImg, and iconImg for pages. optAtts would contain the extra information that gets added dynamically usually by the element being in a database (or survey).

We could also think about storing the atts still as an object, but the optAtts in an array (or could still be in an object). Our databases would then need to show the atts as well as the optAtts.

Access Element and Property types in backend

Currently, I am blind in the backend to types. This is not ideal since a lot of the business logic of actions, adding elements etc. will happen here. I could move to a monorepo... but will do some more research into this. Maybe there is a way to set the type of element data in GraphQL dependent on the variable type.