HooksMixin(feat[run_hook]): Add global_ parameter

why: Hooks set globally (with global_=True) could not be run via
run_hook() because it had no way to pass -g flag to tmux.

what:
- Add global_: bool | None = None parameter to run_hook()
- Add -g flag handling when global_ is True

Author: tony

src/libtmux/hooks.py

@@ -72,6 +72,7 @@ def __init__(self, default_hook_scope: OptionScope | None) -> None:
     def run_hook(
         self,
         hook: str,
+        global_: bool | None = None,
         scope: OptionScope | _DefaultOptionScope | None = DEFAULT_OPTION_SCOPE,
     ) -> Self:
         """Run a hook immediately. Useful for testing."""
@@ -80,6 +81,9 @@ def run_hook(
 
         flags: list[str] = ["-R"]
 
+        if global_ is not None and global_:
+            flags.append("-g")
+
         if scope is not None and not isinstance(scope, _DefaultOptionScope):
             assert scope in HOOK_SCOPE_FLAG_MAP