[Workspace Feeds] [External] Create new Card List page

[mountiny]

Part of the Workspace feeds project.

Implement the following part of the design doc.

@koko57 @VickyStash @allgandalf @DylanDylann

[VickyStash]

Hi, I'm Viktoryia from Callstack - expert contributor group - and I would like to work on this issue.

[mountiny]

Wrong Dylan