Simulate helix line wrapping (#32763)

In helix the `f`, `F`, `t`, `T`, left and right motions wrap lines. I
added that by default.

Release Notes:

- vim: The `use_multiline_find` setting is replaced by binding to the
correct action in the keymap:
    ```
"f": ["vim::PushFindForward", { "before": false, "multiline": true }],
"t": ["vim::PushFindForward", { "before": true, "multiline": true }],
"shift-f": ["vim::PushFindBackward", { "after": false, "multiline": true
}],
"shift-t": ["vim::PushFindBackward", { "after": true, "multiline": true
}],
    ```
- helix: `f`/`t`/`shift-f`/`shift-t`/`h`/`l`/`left`/`right` are now
multiline by default (like helix)

crates/vim/src/helix.rs

@@ -435,4 +435,37 @@ mod test {
     //         Mode::HelixNormal,
     //     );
     // }
+
+    #[gpui::test]
+    async fn test_f_and_t(cx: &mut gpui::TestAppContext) {
+        let mut cx = VimTestContext::new(cx, true).await;
+
+        cx.set_state(
+            indoc! {"
+            The quˇick brown
+            fox jumps over
+            the lazy dog."},
+            Mode::HelixNormal,
+        );
+
+        cx.simulate_keystrokes("f z");
+
+        cx.assert_state(
+            indoc! {"
+                The qu«ick brown
+                fox jumps over
+                the lazˇ»y dog."},
+            Mode::HelixNormal,
+        );
+
+        cx.simulate_keystrokes("2 T r");
+
+        cx.assert_state(
+            indoc! {"
+                The quick br«ˇown
+                fox jumps over
+                the laz»y dog."},
+            Mode::HelixNormal,
+        );
+    }
 }