add separator docs

nicegui/elements/separator.py

@@ -7,6 +7,7 @@ class Separator(Element):
         """Separator
 
         A separator for cards, menus and other component containers.
+        Similar to HTML's <hr> tag.
         """
         super().__init__('q-separator')
         self._classes = ['nicegui-separator']

website/documentation.py

@@ -165,6 +165,7 @@ def create_full() -> None:
         ui.button('Clear', on_click=container.clear)
 
     load_demo(ui.expansion)
+    load_demo(ui.separator)
     load_demo(ui.splitter)
     load_demo('tabs')
     load_demo(ui.stepper)

website/more_documentation/separator_documentation.py

@@ -0,0 +1,7 @@
+from nicegui import ui
+
+
+def main_demo() -> None:
+    ui.label('text above')
+    ui.separator()
+    ui.label('text below')