Formalize an API for programmatically updating prop values

I believe you meant to use this issue queue component?

100% @wim leers, Thanks. 🙏

@wim leers That's my fault, thanks for fixing it!

MR 3538576-stage-1-split-input-behaviors makes no functionality changes - it's just splitting inputBehaviors so the form-specific parts are in dedicated files. It should make the next step easier to review, so perhaps that can get in quickly and we'll focus on the next functionality-impacting MR.

Got a +1 from @hooroomoo to merge the 3538576-stage-1-split-input-behaviors branch. With that in, the MR that actually implements the requested functionality should be easier to review. (it will definitely be easier to implement)

bnjmnm → changed the visibility of the branch 3538576-programatically-update-model-values to hidden.

bnjmnm → changed the visibility of the branch 3538576-stage-1-split-input-behaviors to hidden.

addNewComponentToLayout was updated to address the use case that led to this issue being filed. This makes it relatively easy to programatically add new components with custom values.

This still needs a way to update the values of existing components - which is on the way...

Question: this sounds like it's the start of a formal API, so we probably also want explicit docs, rather than the docs-by-example approach originally taken in 📌 Create extendibility proof of concept that also serves as documentation-by-example Active ?

I've updated the issue summary to make it clear this is more of a feature request.

Re #16 The term Formalize in the issue title is misleading. There's a need to support the specific functionality mentioned in the IS asap, but we agreed at standup (@balintbrews in particular) that this should not be mistaken for formalization, which is something that should be tackled far more holistically. There was a preference that this remain informal.

hooroomoo → changed the visibility of the branch 3538576-two-add-components-to-layout to hidden.

hooroomoo → changed the visibility of the branch 3538576-two-add-components-to-layout to active.

Per @bnjmnm, this needs review.