feat: add library target for unit testing

- Create src/lib.rs with module exports
- Update Cargo.toml with [lib] section
- All 5 unit tests passing

1 files changed, 4 insertions, 0 deletions

diff --git a/Cargo.toml b/Cargo.toml
index dec6113..bdad683 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -45,6 +45,10 @@ thiserror = "1.0"
 # Testing
 tokio-test = "0.4"
 
+[lib]
+name = "ngit_grasp"
+path = "src/lib.rs"
+
 [[bin]]
 name = "ngit-grasp"
 path = "src/main.rs"