vim: ! support (#23169)

Closes #22885
Closes #12565 

This doesn't yet add history in the command palette, which is painfully
missing.

Release Notes:

- vim: Added `:!`, `:<range>!` and `:r!` support
- vim: Added `!` operator in normal/visual mode

crates/vim/src/state.rs

@@ -96,6 +96,7 @@ pub enum Operator {
     Outdent,
     AutoIndent,
     Rewrap,
+    ShellCommand,
     Lowercase,
     Uppercase,
     OppositeCase,
@@ -495,6 +496,7 @@ impl Operator {
             Operator::Jump { line: false } => "`",
             Operator::Indent => ">",
             Operator::AutoIndent => "eq",
+            Operator::ShellCommand => "sh",
             Operator::Rewrap => "gq",
             Operator::Outdent => "<",
             Operator::Uppercase => "gU",
@@ -516,6 +518,7 @@ impl Operator {
                 prefix: Some(prefix),
             } => format!("^V{prefix}"),
             Operator::AutoIndent => "=".to_string(),
+            Operator::ShellCommand => "=".to_string(),
             _ => self.id().to_string(),
         }
     }
@@ -544,6 +547,7 @@ impl Operator {
             | Operator::Indent
             | Operator::Outdent
             | Operator::AutoIndent
+            | Operator::ShellCommand
             | Operator::Lowercase
             | Operator::Uppercase
             | Operator::Object { .. }