Global Attributes (Feature Request)

From what I understand, currently Attributes are not shared across blocks. So if I want multiple blocks to have the same custom Attribute, I need to make sure I remember exactly how it's spelled every time.

Ideally I'd like to be able to create custom Global Attributes. They would be available in a dropdown whenever adding an Attribute to a block.

Also, ideally I'd also like to be able to enforce the content type for each custom Attribute (text, number, true/false, multi-select etc.).

This is to make sure the data is consistent across my entire workspace.

Related post: Attribute View ETA