Update gemini.py

Overhaul Gemini classes for v1.3

- Implement new Multimodal class for handling multiple input types
- Refactor Chat, Text, and Vision classes for improved performance
- Add support for new API features (system prompts, JSON output)
- Implement file caching mechanism for better resource management

Author: RMNCLDYO

gemini.py

@@ -108,6 +108,7 @@ def run(self, api_key=None, model=None, prompt=None, files=None, stream=None, js
             self.initialize_client(api_key, model)
 
             if not self.input_validator.validate_multimodal_input(candidate_count, system_prompt, json, self.model, safety_categories, safety_thresholds):
+                print("[ ERROR ]: Multimodal input validation failed. Please check your parameters and try again.")
                 return
 
             conversation_history = []