Complete passpy stubs (#8959)

stubs/passpy/@tests/stubtest_allowlist.txt

@@ -0,0 +1,6 @@
+passpy.__main__
+
+# Uses `git` dependency:
+passpy.git
+# Uses `gpg` dependency:
+passpy.gpg

stubs/passpy/METADATA.toml

@@ -1 +1,4 @@
 version = "1.0.*"
+
+[tool.stubtest]
+ignore_missing_stub = false

stubs/passpy/passpy/util.pyi

@@ -1 +1,13 @@
+from collections.abc import Callable
+from typing import Any, TypeVar
+
+_C = TypeVar("_C", bound=Callable[..., Any])
+
+# Technically, the first argument of `_C` must be `Store`,
+# but for now we leave it simple:
+def initialised(func: _C) -> _C: ...
+def trap(path_index: str | int) -> Callable[[_C], _C]: ...
 def gen_password(length: int, symbols: bool = ...) -> str: ...
+def copy_move(
+    src: str, dst: str, force: bool = ..., move: bool = ..., interactive: bool = ..., verbose: bool = ...
+) -> str | None: ...