refactor: migrate from MUI to Ant Design for layout and components

- Updated package.json to remove MUI dependencies and add Ant Design.
- Refactored App component to use Ant Design's Layout, Header, Footer, and Sidebar.
- Created new Footer, Header, and Sidebar components using Ant Design.
- Removed old Header component that used MUI.
- Updated Home component to use Ant Design's Typography and Button.
- Added global styles in index.less and theme styles in theme.less and layout.less.
- Removed MUI theme configuration and replaced it with Ant Design's theming.

.gitea/workflows/build.yaml

@@ -3,7 +3,7 @@ name: Build and Deploy MITM Webserver
 on:
   push:
     branches:
-      - main  # oder der Branch, den du automatisch bauen willst
+      - main # oder der Branch, den du automatisch bauen willst
 
 jobs:
   build: