Add drag-and-drop editing to time tracker column

[ivan-lednev]

⚠️ Please check that this feature request hasn't been suggested before.

• I searched previous Issues didn't find any similar feature requests.
• I am only requesting a single feature. Multiple changes should be split into individual requests, with links between them.
• I believe my requested feature will be generally applicable to other users, not just me: it is not uniquely tied to my personal workflow.

🔖 Feature description

We can edit plans with drag-and-drop. The same capability is useful for clock entries.

✔️ Solution

Implement a drag-and-drop UI similar to planner columns.

❓ Alternatives

No response

📝 Additional Context

No response