debugger: Process ANSI color escape codes in console (#32817)

- [x] foreground highlights
- [x] background highlights
- [x] advertise support in DAP capabilities

Closes #31372

Release Notes:

- Debugger Beta: added basic support for highlighting in the console
based on ANSI escape codes.

crates/search/src/project_search.rs

@@ -1377,7 +1377,7 @@ impl ProjectSearchView {
                 }
                 editor.highlight_background::<Self>(
                     &match_ranges,
-                    |theme| theme.search_match_background,
+                    |theme| theme.colors().search_match_background,
                     cx,
                 );
             });