refactor(divan_compat): make private module inline

Author: GuillaumeLagrange

crates/divan_compat/src/compat/mod.rs

@@ -1,7 +1,13 @@
-// Used by generated code. Not public API and thus not subject to SemVer.
+// Used by generated code from the macro `codspeed_divan_compat_macros::bench_compat`
 #[doc(hidden)]
-#[path = "private.rs"]
-pub mod __private;
+pub mod __private {
+    pub use super::{
+        bench::{BenchArgs, BenchOptions},
+        entry::{BenchEntry, BenchEntryRunner, EntryList, EntryLocation, EntryMeta, BENCH_ENTRIES},
+    };
+
+    pub use divan::__private::{Arg, ToStringHelper};
+}
 
 mod bench;
 mod entry;