[Workspace Feeds] [External] Add logic for the disabled toggle

[mountiny]

Part of the Workspace feeds project.

Implement the following part of the design doc.

@koko57 @VickyStash @allgandalf @DylanDylann

[narefyev91]

Hi, I'm Nicolay from Callstack - expert agency - and I would like to work on this issue.

[allgandalf]

I can review this when ready 👍

[allgandalf]

@narefyev91 any ETA for this? lets get the ball rolling 🏎️