Closes #12635

- [x] Get it working
- [x] Disable for multi cursor
- [x] Disable for vim visual line selection
- [x] Add setting to disable it
- [x] Add scrollbar marker
- [x] Handle delete state capturing selection

Preview:

https://github.com/user-attachments/assets/a76cde64-4f6c-4575-91cc-3a03a954e7a9

Release Notes:

- Added support to highlight all matching occurrences of text within the
selection in editor.

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Co-authored-by: Agus Zubiaga <agus@zed.dev>
Co-authored-by: Danilo <danilo@zed.dev>