Add stop_at_indent for Editor::DeleteToBeginningOfLine (#25688)

Added test_beginning_of_line_stop_at_indent editor test

- Follow-up to: https://github.com/zed-industries/zed/pull/25428
- Replaces: https://github.com/zed-industries/zed/pull/25346

This is all authored by @felixpackard in #25346
I just updated it to use `stop_at_indent` instead of
`stop_at_first_char`.

Release Notes:

- Added support for `stop_at_indent` to
`Editor::DeleteToBeginningOfLine` (thanks
[@felixpackard](https://github.com/felixpackard))

Co-authored-by: Felix Packard <felix@rigr.gg>

crates/editor/src/editor.rs

@@ -9516,7 +9516,7 @@ impl Editor {
 
     pub fn delete_to_beginning_of_line(
         &mut self,
-        _: &DeleteToBeginningOfLine,
+        action: &DeleteToBeginningOfLine,
         window: &mut Window,
         cx: &mut Context<Self>,
     ) {
@@ -9530,7 +9530,7 @@ impl Editor {
             this.select_to_beginning_of_line(
                 &SelectToBeginningOfLine {
                     stop_at_soft_wraps: false,
-                    stop_at_indent: false,
+                    stop_at_indent: action.stop_at_indent,
                 },
                 window,
                 cx,