[feature]: Workflow Approval Request

Is there an existing issue for this?

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Summary

Current workflow implementation prevents non-approvers from moving work items between states as intended. However, there is no way for a non-approver to request approval from an approver for a work item be moved to a new state. Feature Request: allow non-approvers to request approval to move a work item to a new state from an approver.

Why should this be worked on?

In the current state non-approvers need to ask approvers to move work items via a comment in Plane or side-channel outside of Plane. Adding this capability natively in Plane is a better UX and better captures the history of a work items transitions between states.