This PR adds support for select first & last actions, as I was missing
them badly :).

**Example**:


https://github.com/user-attachments/assets/709037e6-544c-4891-8f48-7808d556a5a2

Before you mark this PR as ready for review, make sure that you have:
- [x] Added a solid test coverage and/or screenshots from doing manual
testing
- [x] Done a self-review taking into account security and performance
aspects
- [x] Aligned any UI changes with the [UI
checklist](https://github.com/zed-industries/zed/blob/main/CONTRIBUTING.md#uiux-checklist)

Release Notes:

- N/A