Add HuggingFace model auto-fetch feature

- Added model identifier input field with Fetch button
- Added loading indicator for fetch operation
- Added async handleHfFetch function to fetch config from HuggingFace
- Fetches config from https://huggingface.co/{model}/blob/main/config.json
- Replaces current config when fetch is successful
- Shows 'Model not found' error for 404 responses
- Sets focus on model input after successful fetch
- Added translations for new fields

css/styles.css

@@ -367,3 +367,18 @@ html[lang="en"] .tooltip-icon:hover::after {
     align-self: flex-end;
   }
 }
+
+.loading-indicator {
+  text-align: center;
+  font-style: italic;
+  color: #0000FF;
+  padding: 10px;
+}
+
+#hf-fetch-btn {
+  background-color: #0000FF;
+}
+
+#hf-fetch-btn:hover {
+  background-color: #0000AA;
+}