feat(lib): add Slide.next_section method (#295)

* feat(lib): add `Slide.next_section` method

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

manim_slides/slide/manim.py

@@ -64,6 +64,25 @@ class Slide(BaseSlide, Scene):  # type: ignore[misc]
     def _start_at_animation_number(self) -> Optional[int]:
         return config["from_animation_number"]  # type: ignore
 
+    def next_section(self, *args: Any, **kwargs: Any) -> None:
+        """
+        Alias to :meth:`next_slide`.
+
+        :param args:
+            Positional arguments to be passed to :meth:`next_slide`.
+        :param kwargs:
+            Keyword arguments to be passed to :meth:`next_slide`.
+
+        .. attention::
+
+            This method is only available when using ``manim`` API.
+        """
+        self.next_slide(*args, **kwargs)
+
+    def next_slide(self, *args: Any, loop: bool = False, **kwargs: Any) -> None:
+        Scene.next_section(self, *args, **kwargs)
+        BaseSlide.next_slide(self, loop=loop)
+
     def render(self, *args: Any, **kwargs: Any) -> None:
         """MANIM render."""
         # We need to disable the caching limit since we rely on intermediate files