feat(ws): Add Empty State to Workspace list

[liavweiss]

fix #259

[google-oss-prow]

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[paulovmr]

/ok-to-test

[paulovmr]

Hi @liavweiss , thanks for the PR. Please consider extracting the empty state from the WorkspaceKinds.tsx file as a reusable component and use it here, also including the CLEAR ALL FILTERS button.

[jenny-s51]

Suggested change

	<Td colSpan={11} id="empty-state">
	<Td colSpan={12} id="empty-state">

The table has 12 columns including the columnNames and the two actions columns.

[jenny-s51]

Thanks for implementing the empty state in the workspace table @liavweiss! Great work.

A couple of suggestions for improvement:

• I agree with @paulovmr - we should extract the empty state component into a dedicated reusable component to ensure consistency when we need similar empty states elsewhere.

• Can we also include a "Clear all filters" button in the empty state so the users can easily click the action button to recover from the empty state? https://www.patternfly.org/components/empty-state/#no-match-found is a good example of this in action.

[ederign]

/retitle feat(ws): Add Empty State to Workspace list