vim: Add Multi Replace mode in Vim (#8469)

For #4440, I've only added support for normal, if it's visual mode,
would we like this to delete the current selection row and enter insert
mode?

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

crates/vim/src/object.rs

@@ -98,7 +98,7 @@ fn object(object: Object, cx: &mut WindowContext) {
     match Vim::read(cx).state().mode {
         Mode::Normal => normal_object(object, cx),
         Mode::Visual | Mode::VisualLine | Mode::VisualBlock => visual_object(object, cx),
-        Mode::Insert => {
+        Mode::Insert | Mode::Replace => {
             // Shouldn't execute a text object in insert mode. Ignoring
         }
     }