fix: refresh diff colors on terminal theme changes

vendor/crossterm/src/event/source.rs

@@ -0,0 +1,27 @@
+use std::{io, time::Duration};
+
+#[cfg(feature = "event-stream")]
+use super::sys::Waker;
+use super::InternalEvent;
+
+#[cfg(unix)]
+pub(crate) mod unix;
+#[cfg(windows)]
+pub(crate) mod windows;
+
+/// An interface for trying to read an `InternalEvent` within an optional `Duration`.
+pub(crate) trait EventSource: Sync + Send {
+    /// Tries to read an `InternalEvent` within the given duration.
+    ///
+    /// # Arguments
+    ///
+    /// * `timeout` - `None` block indefinitely until an event is available, `Some(duration)` blocks
+    ///   for the given timeout
+    ///
+    /// Returns `Ok(None)` if there's no event available and timeout expires.
+    fn try_read(&mut self, timeout: Option<Duration>) -> io::Result<Option<InternalEvent>>;
+
+    /// Returns a `Waker` allowing to wake/force the `try_read` method to return `Ok(None)`.
+    #[cfg(feature = "event-stream")]
+    fn waker(&self) -> Waker;
+}