Add file and project search panels

src/panel.zig

@@ -155,6 +155,14 @@ pub const Stack = struct {
         return list.selected.?;
     }
 
+    pub fn activeListItem(self: *const Stack) ![]const u8 {
+        const index = self.active_index orelse return Error.NoPanelOpen;
+        const panel = self.panels.items[index];
+        if (panel.kind != .list or panel.list == null) return Error.ActivePanelIsNotList;
+        const list = panel.list.?;
+        return self.visibleItemAt(list.cursor) orelse Error.EmptyList;
+    }
+
     pub fn cancelList(self: *Stack) !void {
         _ = try self.activeList();
         try self.closeActive();