Move from import google.generativeai as genai to import google as genai

[PratikRules]

Change the default Google library from google-generativeai to google-genai. Also the import statement import google.generativeai as genai should be changed to import google as genai to support new advanced features such as system instructions and grounding with google search.

[lkuligin]

not sure that's the case, we use Gapic API.