feat(assets): add light and dark mode logos for improved branding

- Introduced new logo images for both light and dark modes, enhancing the visual consistency of the application.
- Updated references in AuthPageHeader, NavbarLogo, AccountSetup, and ProjectViewInsights components to use the new logo images.

worklenz-frontend/src/features/navbar/navbar-logo.tsx

@@ -1,8 +1,8 @@
 import { Link } from 'react-router-dom';
 import { useTranslation } from 'react-i18next';
 
-import logo from '@/assets/images/logo.png';
-import logoDark from '@/assets/images/logo-dark-mode.png';
+import logo from '@/assets/images/worklenz-light-mode.png';
+import logoDark from '@/assets/images/worklenz-dark-mode.png';
 
 import { useAppSelector } from '@/hooks/useAppSelector';
 import { useSelector } from 'react-redux';
@@ -20,23 +20,6 @@ const NavbarLogo = () => {
           alt={t('logoAlt')}
           style={{ width: '100%', maxWidth: 140 }}
         />
-        <span
-          style={{
-            position: 'absolute',
-            top: -1,
-            right: 0,
-            backgroundColor: '#ff5722',
-            color: 'white',
-            fontSize: '7px',
-            padding: '0px 3px',
-            borderRadius: '3px',
-            fontWeight: 'bold',
-            textTransform: 'uppercase',
-            lineHeight: '1.8',
-          }}
-        >
-          Beta
-        </span>
       </div>
     </Link>
   );