vim hml (#7298)

- Add a setting for `vertical_scroll_offset`
- Fix H/M/L in vim with scrolloff



Release Notes:

- Added a settings for `vertical_scroll_offset`
- vim: Fix H/M/L with various values of vertical_scroll_offset

---------

Co-authored-by: Vbhavsar <vbhavsar@gmail.com>
Co-authored-by: fdionisi <code@fdionisi.me>

crates/editor/src/display_map.rs

@@ -586,8 +586,9 @@ impl DisplaySnapshot {
             text_system,
             editor_style,
             rem_size,
-            anchor: _,
+            scroll_anchor: _,
             visible_rows: _,
+            vertical_scroll_margin: _,
         }: &TextLayoutDetails,
     ) -> Arc<LineLayout> {
         let mut runs = Vec::new();