feat: improve error messages when path is not found in commit

src/git/mod.rs

@@ -46,14 +46,19 @@ pub fn change_since_last_release(package: &Package, ctx: &crate::Context) -> any
                         .peel_to_kind(object::Kind::Tree)?
                         .into_tree()
                         .peel_to_entry(components.clone())?
-                        .expect("path must exist in current commit")
+                        .unwrap_or_else(|| panic!("path '{}' must exist in current_commit `{}`", dir, current_commit))
                         .object_id();
                     let released_dir_id = released_target
                         .object()?
                         .peel_to_kind(object::Kind::Tree)?
                         .into_tree()
                         .peel_to_entry(components)?
-                        .expect("path must exist as it was supposedly released there")
+                        .unwrap_or_else(|| {
+                            panic!(
+                                "path '{}' in released_target commit `{}` must exist as it was supposedly released there. Was it moved to a different directory?",
+                                dir, released_target
+                            )
+                        })
                         .object_id();
 
                     (released_dir_id != current_dir_id).then_some(PackageChangeKind::ChangedOrNew)