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

assets/keymaps/vim.json

@@ -539,6 +539,7 @@
     "bindings": {
       "d": "vim::CurrentLine",
       "s": "vim::PushDeleteSurrounds",
+      "v": "vim::PushForcedMotion", // "d v"
       "o": "editor::ToggleSelectedDiffHunks", // "d o"
       "shift-o": "git::ToggleStaged",
       "p": "git::Restore", // "d p"
@@ -587,6 +588,7 @@
     "context": "vim_operator == y",
     "bindings": {
       "y": "vim::CurrentLine",
+      "v": "vim::PushForcedMotion",
       "s": ["vim::PushAddSurrounds", {}]
     }
   },