cli/__init__(refactor[typing]): Narrow parser tuple type

why: Replace t.Any in create_parser returns with explicit subparser tuple typing.

what:
- Add SubparserTuple type alias for six CLI subparsers
- Use the alias in create_parser overloads and return annotation

Author: tony

src/vcspull/cli/__init__.py

@@ -25,6 +25,16 @@
 log = logging.getLogger(__name__)
 
 
+SubparserTuple: t.TypeAlias = tuple[
+    argparse.ArgumentParser,
+    argparse.ArgumentParser,
+    argparse.ArgumentParser,
+    argparse.ArgumentParser,
+    argparse.ArgumentParser,
+    argparse.ArgumentParser,
+]
+
+
 def build_description(
     intro: str,
     example_blocks: t.Sequence[tuple[str | None, t.Sequence[str]]],
@@ -208,7 +218,7 @@ def build_description(
 @overload
 def create_parser(
     return_subparsers: t.Literal[True],
-) -> tuple[argparse.ArgumentParser, t.Any]: ...
+) -> tuple[argparse.ArgumentParser, SubparserTuple]: ...
 
 
 @overload
@@ -217,7 +227,7 @@ def create_parser(return_subparsers: t.Literal[False]) -> argparse.ArgumentParse
 
 def create_parser(
     return_subparsers: bool = False,
-) -> argparse.ArgumentParser | tuple[argparse.ArgumentParser, t.Any]:
+) -> argparse.ArgumentParser | tuple[argparse.ArgumentParser, SubparserTuple]:
     """Create CLI argument parser for vcspull."""
     parser = argparse.ArgumentParser(
         prog="vcspull",