Add placeholder pages, change order of boxes in user management

src/ez_lan_manager/pages/ManageTournamentsPage.py

@@ -0,0 +1,32 @@
+import logging
+
+from rio import Column, Component, event, TextStyle, Text, Spacer
+
+from src.ez_lan_manager import ConfigurationService
+from src.ez_lan_manager.components.MainViewContentBox import MainViewContentBox
+
+logger = logging.getLogger(__name__.split(".")[-1])
+
+class ManageTournamentsPage(Component):
+    @event.on_populate
+    async def on_populate(self) -> None:
+        await self.session.set_title(f"{self.session[ConfigurationService].get_lan_info().name} - Turnier Verwaltung")
+
+    def build(self) -> Component:
+        return Column(
+            MainViewContentBox(
+                Column(
+                    Text(
+                        text="Turnier Verwaltung",
+                        style=TextStyle(
+                            fill=self.session.theme.background_color,
+                            font_size=1.2
+                        ),
+                        margin_top=2,
+                        margin_bottom=2,
+                        align_x=0.5
+                    )
+                )
+            ),
+            Spacer()
+        )