fix(xatu): ignore testdata directories

src/flake/apps.nix

@@ -35,7 +35,7 @@ in
               src/xatu/testdata \
               third_party \
             -- .
-          xatu configs/nixos flake.nix src/dotfiles src/flake src/xatu/package.nix
+          xatu .
           treefmt
         '';
       }

src/xatu/xatu_main.rs

@@ -20,6 +20,7 @@ fn is_excluded_dir(path: &Path) -> bool {
                     | "bazel-out"
                     | "bazel-testlogs"
                     | "target"
+                    | "testdata"
                     | "third_party"
             ) || name == "result"
                 || name.starts_with("result-")