Add Batch Operations to Interactive Rebase Visualization

[jackiotyu]

Currently, the interactive rebase visualization feature in GitLens is very helpful for managing and editing commits. However, it would be even more powerful if it supported batch operations. For example:

1. Selecting multiple commits to squash them into one.

2. Changing the action (e.g., reword, drop, etc.) for multiple commits at once.

3. Rearranging multiple commits in a single drag-and-drop action.

These batch operations would greatly enhance the usability of this feature, especially for users working with long commit histories.

Is this something you would consider adding in future updates? Thank you for the amazing tool!