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);