options(docs): Update g parameter docstrings to reflect DeprecatedError

why: Docstrings still described g as functional when it now raises error
what:
- Update 6 docstring locations to indicate g raises DeprecatedError
- Add deprecation directive pointing to global_ replacement

Author: tony

src/libtmux/options.py

@@ -795,8 +795,9 @@ def _show_options_raw(
 
         Parameters
         ----------
-        g : str, optional
-            Pass ``-g`` flag for global variable, default False.
+        g : bool, optional
+            .. deprecated:: 0.50.0
+               Use ``global_`` instead. Raises :exc:`~libtmux.exc.DeprecatedError`.
 
         Examples
         --------
@@ -862,8 +863,9 @@ def _show_options_dict(
 
         Parameters
         ----------
-        g : str, optional
-            Pass ``-g`` flag for global variable, default False.
+        g : bool, optional
+            .. deprecated:: 0.50.0
+               Use ``global_`` instead. Raises :exc:`~libtmux.exc.DeprecatedError`.
 
         Examples
         --------
@@ -911,8 +913,9 @@ def _show_options(
 
         Parameters
         ----------
-        g : str, optional
-            Pass ``-g`` flag for global variable, default False.
+        g : bool, optional
+            .. deprecated:: 0.50.0
+               Use ``global_`` instead. Raises :exc:`~libtmux.exc.DeprecatedError`.
 
         Examples
         --------
@@ -1011,7 +1014,8 @@ def _show_option_raw(
         ----------
         option : str
         g : bool, optional
-            Pass ``-g`` flag, global. Default False.
+            .. deprecated:: 0.50.0
+               Use ``global_`` instead. Raises :exc:`~libtmux.exc.DeprecatedError`.
 
         Raises
         ------
@@ -1102,7 +1106,8 @@ def _show_option(
         ----------
         option : str
         g : bool, optional
-            Pass ``-g`` flag, global. Default False.
+            .. deprecated:: 0.50.0
+               Use ``global_`` instead. Raises :exc:`~libtmux.exc.DeprecatedError`.
 
         Raises
         ------
@@ -1204,7 +1209,8 @@ def show_option(
         ----------
         option : str
         g : bool, optional
-            Pass ``-g`` flag, global. Default False.
+            .. deprecated:: 0.50.0
+               Use ``global_`` instead. Raises :exc:`~libtmux.exc.DeprecatedError`.
 
         Raises
         ------