feat: Update environment variables and modify model mappings

- Added `OPENROUTER_API_KEY` and `AZURE_API_KEYS` to `example.env`.
- Updated `AZURE_DEFAULT_MODEL` to "model-router" in `example.env`.
- Added `AZURE_ROUTES` with multiple model URLs in `example.env`.
- Changed the mapping for `"phi-4-multimodal"` in `DeepInfraChat.py` to `"microsoft/Phi-4-multimodal-instruct"`.
- Added `media` parameter to `GptOss.create_completion` method and raised a `ValueError` if `media` is provided.
- Updated `model_aliases` in `any_model_map.py` to include new mappings for various models.
- Removed several model aliases from `PollinationsAI` in `any_model_map.py`.
- Added new models and updated existing models in `model_map` across various files, including `any_model_map.py` and `__init__.py`.
- Refactored `AnyModelProviderMixin` to include `model_aliases` and updated the logic for handling model aliases.

g4f/gui/server/backend_api.py

@@ -127,6 +127,7 @@ class Backend_Api(Api):
             except MissingAuthError as e:
                 return jsonify({"error": {"message": f"{type(e).__name__}: {e}"}}), 401
             except Exception as e:
+                logger.exception(e)
                 return jsonify({"error": {"message": f"{type(e).__name__}: {e}"}}), 500
             return jsonify(response)