general improvement and bug fixes, cursor scaling, DMA-BUF routing and nested backend recovery

ignore performance-baseline.md

more improvement and code quality fixes

compositor/src/backends/direct/capture.rs

@@ -67,7 +67,7 @@ pub(super) fn capture_mirror(
     }
 }
 
-fn capture_request<T, E: Display>(
+pub(crate) fn capture_request<T, E: Display>(
     state: &mut Ferese,
     output: &Output,
     include_cursor: bool,