Fix Git editor reword workflow and UI coverage

- show Git editor file paths instead of the submitted git command
- surface follow-up commit message editors during interactive rebase reword
- add rename-commit UI tests for editor and amend-message solution paths
- add broader embedded level solution scenarios for alternate Git workflows

app/src/main/java/solutions/tretter/githugandroid/InteractiveAddEngine.kt

@@ -51,6 +51,7 @@ internal object InteractiveAddEngine {
             command = command,
             kind = GitEditorCommandKind.PATCH_HUNK,
             title = "Edit Patch Hunk",
+            displayPath = target,
             initialContent = editablePatchHunkContent(file),
         )
     }