Partially addresses this issue #5294

Adds a selector between `LF` and `CRLF` for the buffer's line endings,
the checkmark denotes the currently selected line ending.

Selector
<img width="487" height="66" alt="image"
src="https://github.com/user-attachments/assets/13f2480f-4d2d-4afe-adf5-385aeb421393"
/>

Release Notes:

- Added line ending selector.

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Co-authored-by: Conrad Irwin <conrad.irwin@gmail.com>