Fix cmd+k in terminal and fix sporadic keybind misses (#7388)

This fixes `cmd+k` in the terminal taking 1s to have an effect. It is
now immediate.

It also fixes #7270 by ensuring that we don't set a bad state when
matching keybindings.

It matches keybindings per context and if it finds a match on a lower
context it doesn't keep pending keystrokes. If it finds two matches on
the same context level, requiring more keystrokes, then it waits.



Release Notes:

- Fixed `cmd-k` in terminal taking 1s to have an effect. Also fixed
sporadic non-matching of keybindings if there are overlapping
keybindings.
([#7270](https://github.com/zed-industries/zed/issues/7270)).

---------

Co-authored-by: Conrad <conrad@zed.dev>
Co-authored-by: Conrad Irwin <conrad.irwin@gmail.com>

crates/collab/src/tests/integration_tests.rs

@@ -5967,6 +5967,6 @@ async fn test_cmd_k_left(cx: &mut TestAppContext) {
     cx.executor().advance_clock(Duration::from_secs(2));
     cx.simulate_keystrokes("left");
     workspace.update(cx, |workspace, cx| {
-        assert!(workspace.items(cx).collect::<Vec<_>>().len() == 3);
+        assert!(workspace.items(cx).collect::<Vec<_>>().len() == 2);
     });
 }