add plugin blocks to block factory

[maribethb]

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Component

examples/developer-tools

This can be split up into multiple issues later if needed.

Problem

No response

Request

integrate angle, multiline text, colour fields

This includes replacing the angle field in the built-in colour block in the factory itself.

Alternatives considered

No response

Additional context

No response

[BeksOmega]

I think the multiline text field still needs to be added.