chore: suppress clippy dead_code warnings for test context structs

Add #[allow(dead_code)] annotations to TestContextRepo struct and its git method
to resolve false positive dead code warnings in CI pipeline. These are
incorrectly detected as unused by clippy but are actually used in integration tests.

Author: Mubashwer

tests/helpers/test_contexts.rs

@@ -23,7 +23,7 @@ pub(crate) struct TestContextCli {
 }
 
 impl TestContextCli {
-    #[allow(dead_code)] // incorrectly detected as unused by rustc; used in tests
+    #[allow(dead_code)] // incorrectly detected as unused by clippy; used in tests
     pub fn git(&self) -> Command {
         let mut command = Command::new("git");
         command.env("PATH", &*PATH_WITH_GIT_MOB);
@@ -40,13 +40,15 @@ impl TestContext for TestContextCli {
     }
 }
 
+#[allow(dead_code)] // incorrectly detected as unused by clippy; used in tests
 pub(crate) struct TestContextRepo {
     git_config_global: TempPath,
     dir: TempDir,
     pub home_dir: TempDir,
 }
 
 impl TestContextRepo {
+    #[allow(dead_code)] // incorrectly detected as unused by clippy; used in tests
     pub fn git(&self) -> Command {
         let mut command = Command::new("git");
         command