chore: add .worktrees to .gitignore

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: petrsnd

.gitignore

@@ -130,3 +130,6 @@ dmypy.json
 
 # Pyre type checker
 .pyre/
+
+# Worktrees
+.worktrees/