vim: Add some forced motion support (#27991)

Closes https://github.com/zed-industries/zed/issues/20971

Added `v` input to yank and delete to override default motion. The
global vim state tracking if the forced motion flag was passed handled
the same way that the count is. [The main chunk of code maps the motion
kind from the default to the overridden
kind](https://github.com/zed-industries/zed/pull/27991/files#diff-2dca6b7d1673c912d14e4edc74e415abbe3a4e6d6b37e0e2006d30828bf4bb9cR1249-R1254).
To handle the case of deleting a single character (dv0) at the start of
a row I had to modify the control flow
[here](https://github.com/zed-industries/zed/pull/27991/files#diff-2dca6b7d1673c912d14e4edc74e415abbe3a4e6d6b37e0e2006d30828bf4bb9cR1240-R1244).
Then to handle an exclusive delete till the end of the row (dv$) I
[saturated the endpoint with a left
bias](https://github.com/zed-industries/zed/pull/27991/files#diff-2dca6b7d1673c912d14e4edc74e415abbe3a4e6d6b37e0e2006d30828bf4bb9cR1281-R1286).

Test case: dv0


https://github.com/user-attachments/assets/613cf9fb-9732-425c-9179-025f3e107584

Test case: yvjp


https://github.com/user-attachments/assets/550b7c77-1eb8-41c3-894b-117eb50b7a5d

Release Notes:

- Added some forced motion support for delete and yank

crates/vim/src/command.rs

@@ -234,6 +234,7 @@ pub fn register(editor: &mut Editor, cx: &mut Context<Vim>) {
             return;
         };
         let count = Vim::take_count(cx).unwrap_or(1);
+        Vim::take_forced_motion(cx);
         let n = if count > 1 {
             format!(".,.+{}", count.saturating_sub(1))
         } else {
@@ -1323,6 +1324,7 @@ impl Vim {
         &mut self,
         motion: Motion,
         times: Option<usize>,
+        forced_motion: bool,
         window: &mut Window,
         cx: &mut Context<Vim>,
     ) {
@@ -1335,7 +1337,13 @@ impl Vim {
             let start = editor.selections.newest_display(cx);
             let text_layout_details = editor.text_layout_details(window);
             let (mut range, _) = motion
-                .range(&snapshot, start.clone(), times, &text_layout_details)
+                .range(
+                    &snapshot,
+                    start.clone(),
+                    times,
+                    &text_layout_details,
+                    forced_motion,
+                )
                 .unwrap_or((start.range(), MotionKind::Exclusive));
             if range.start != start.start {
                 editor.change_selections(None, window, cx, |s| {