feat(docs, ui): restructure frontend documentation & introduce Vision directories for modularity

- Moved existing FIGMA-related files into `Vison_01` and `Vision_02` folders to better support versioning and collaboration.
- Added PostCSS configuration for extending plugins in Tailwind CSS.
- Introduced new style guidelines, theme configurations, and modular imports for `Vision_02`.
- Documented detailed ÖTO tournament structures and parameters for CSN/CDN inclusions.
- Enhanced routing and UI files for future scalability, including new `theme.tsx` and `routes.tsx`.

Signed-off-by: Stefan Mogeritsch <stefan.mo.co@gmail.com>

docs/06_Frontend/FIGMA/Vision_02/src/app/App.tsx

@@ -0,0 +1,16 @@
+import {ThemeProvider} from '@mui/material/styles';
+import CssBaseline from '@mui/material/CssBaseline';
+import {RouterProvider} from 'react-router';
+import {theme} from './theme';
+import {router} from './routes';
+
+function App() {
+  return (
+    <ThemeProvider theme={theme}>
+      <CssBaseline/>
+      <RouterProvider router={router}/>
+    </ThemeProvider>
+  );
+}
+
+export default App;