refactor test-structure to match the 'new style'.

Author: Byron

gix-dir/Cargo.toml

@@ -12,6 +12,7 @@ rust-version = "1.65"
 
 [lib]
 doctest = false
+test = false
 
 [dependencies]
 gix-trace = { version = "^0.1.11", path = "../gix-trace" }

gix-dir/tests/dir.rs renamed to gix-dir/tests/dir/main.rs

@@ -1,4 +1,5 @@
 pub use gix_testtools::Result;
 
 mod walk;
+#[path = "../walk_utils/mod.rs"]
 pub mod walk_utils;