Add docstring to :meth:Mobject.family_members_with_points (#4128)

* Add example to family_members_with_points method in Mobject

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* Add the word 'recursively' to clarify the method description

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* Improve the sentence of method description

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* Improve the method description

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* Adding brackets

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* Add 'See also' section

* Update manim/mobject/mobject.py

Co-authored-by: Francisco Manríquez Novoa <[email protected]>

* chenge list to list[Mobject]

---------

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>
Co-authored-by: Francisco Manríquez Novoa <[email protected]>

Author: 3 people

manim/mobject/mobject.py

@@ -2319,7 +2319,7 @@ def get_family(self, recurse: bool = True) -> list[Self]:
 
         Returns
         -------
-        list
+        list[Mobject]
             A list of mobjects in the family of the given mobject.
 
         Examples
@@ -2333,12 +2333,39 @@ def get_family(self, recurse: bool = True) -> list[Self]:
             >>> gr.get_family()
             [Group, VGroup(Square, Rectangle), Square, Rectangle, Mobject, VMobject]
 
+        See also
+        --------
+        :meth:`~.Mobject.family_members_with_points`, :meth:`~.Mobject.align_data`
+
         """
         sub_families = [x.get_family() for x in self.submobjects]
         all_mobjects = [self] + list(it.chain(*sub_families))
         return remove_list_redundancies(all_mobjects)
 
     def family_members_with_points(self) -> list[Self]:
+        """Filters the list of family members (generated by :meth:`.get_family`) to include only mobjects with points.
+
+        Returns
+        -------
+        list[Mobject]
+            A list of mobjects that have points.
+
+        Examples
+        --------
+        ::
+
+            >>> from manim import Square, Rectangle, VGroup, Group, Mobject, VMobject
+            >>> s, r, m, v = Square(), Rectangle(), Mobject(), VMobject()
+            >>> vg = VGroup(s, r)
+            >>> gr = Group(vg, m, v)
+            >>> gr.family_members_with_points()
+            [Square, Rectangle]
+
+        See also
+        --------
+        :meth:`~.Mobject.get_family`
+
+        """
         return [m for m in self.get_family() if m.get_num_points() > 0]
 
     def arrange(