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/levels/RevertLevel.kt

@@ -27,5 +27,7 @@ internal fun revertLevel(): Level = level(
     validator = repoPredicate { repo -> repo.commits.any { it.message.startsWith("Revert") } },
     testCases = listOf(
         levelTestCase("revert middle commit", "git revert HEAD~1"),
+        levelTestCase("revert middle commit without editor", "git revert --no-edit HEAD~1"),
+        levelTestCase("revert caret commit", "git revert HEAD^"),
     ),
 )