feat: add cancel action to idle_actions

src/config.zig

@@ -79,6 +79,7 @@ const default_actions = [_]IdleAction{};
 pub const IdleAction = enum {
     hover,
     highlight_references,
+    cancel,
 };
 
 pub const DigitStyle = enum {

src/tui/editor.zig

@@ -6928,6 +6928,10 @@ pub const EditorWidget = struct {
                 try self.editor.hover_at_abs(@intCast(self.hover_y), @intCast(self.hover_x));
         } else if (try m.match(.{"input_idle"})) {
             for (tui.config().idle_actions) |action| switch (action) {
+                .cancel => {
+                    self.editor.cancel_all_matches();
+                    tui.need_render();
+                },
                 .hover => {
                     try self.editor.hover(.{});
                 },