feat: update ExtrasSelector and GrowTentKonfigurator for VAT display and extras handling

- Refactored ExtrasSelector to include VAT information for each extra, enhancing clarity for users.
- Removed unused extras data from configuratorData.js to streamline the codebase.
- Updated GrowTentKonfigurator to dynamically retrieve extras from cached data, ensuring accurate pricing and VAT display for selected items.
- Improved UI layout for price and VAT information across various components for better user experience.

src/components/configurator/ExtrasSelector.js

@@ -67,9 +67,16 @@ class ExtrasSelector extends Component {
               sx={{ margin: 0 }}
               onClick={(e) => e.stopPropagation()}
             />
-            <Typography variant="h6" sx={{ color: '#2e7d32', fontWeight: 'bold' }}>
-              {this.formatPrice(extra.price)}
-            </Typography>
+            <Box sx={{ textAlign: 'right' }}>
+              <Typography variant="h6" sx={{ color: '#2e7d32', fontWeight: 'bold' }}>
+                {this.formatPrice(extra.price)}
+              </Typography>
+              {extra.vat && (
+                <Typography variant="caption" sx={{ color: '#77aa77', fontSize: '0.6em' }}>
+                  (incl. {extra.vat}% MwSt.,*)
+                </Typography>
+              )}
+            </Box>
           </Box>
           
           <Typography variant="h6" gutterBottom sx={{ fontWeight: 'bold' }}>