vim: Add support for temporary normal mode (ctrl-o) within insert mode (#19454)

Support has been added for the ctrl-o command within insert mode. Ctrl-o
is used to partially enter normal mode for 1 motion to then return back
into insert mode.

Release Notes:

- vim: Added support for `ctrl-o` in insert mode to enter temporary
normal mode

---------

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

crates/vim/src/normal/paste.rs

@@ -176,7 +176,7 @@ impl Vim {
                                     .0;
                                 }
                                 cursor = movement::indented_line_beginning(map, cursor, true);
-                            } else if !is_multiline {
+                            } else if !is_multiline && !vim.temp_mode {
                                 cursor = movement::saturating_left(map, cursor)
                             }
                             cursors.push(cursor);

crates/vim/src/normal/repeat.rs

@@ -3,6 +3,7 @@ use std::{cell::RefCell, rc::Rc};
 use crate::{
     insert::NormalBefore,
     motion::Motion,
+    normal::InsertBefore,
     state::{Mode, Operator, RecordedSelection, ReplayableAction, VimGlobals},
     Vim,
 };
@@ -308,6 +309,11 @@ impl Vim {
 
         actions.push(ReplayableAction::Action(EndRepeat.boxed_clone()));
 
+        if self.temp_mode {
+            self.temp_mode = false;
+            actions.push(ReplayableAction::Action(InsertBefore.boxed_clone()));
+        }
+
         let globals = Vim::globals(cx);
         globals.dot_replaying = true;
         let mut replayer = globals.replayer.get_or_insert_with(Replayer::new).clone();

crates/vim/src/normal/search.rs

@@ -139,6 +139,11 @@ impl Vim {
                         options |= SearchOptions::REGEX;
                     }
                     search_bar.set_search_options(options, cx);
+                    let prior_mode = if self.temp_mode {
+                        Mode::Insert
+                    } else {
+                        self.mode
+                    };
 
                     self.search = SearchState {
                         direction,
@@ -146,7 +151,7 @@ impl Vim {
                         initial_query: query,
                         prior_selections,
                         prior_operator: self.operator_stack.last().cloned(),
-                        prior_mode: self.mode,
+                        prior_mode,
                     }
                 });
             }

crates/vim/src/normal/yank.rs

@@ -42,6 +42,7 @@ impl Vim {
                 });
             });
         });
+        self.exit_temporary_normal(cx);
     }
 
     pub fn yank_object(&mut self, object: Object, around: bool, cx: &mut ViewContext<Self>) {
@@ -65,6 +66,7 @@ impl Vim {
                 });
             });
         });
+        self.exit_temporary_normal(cx);
     }
 
     pub fn yank_selections_content(