Add Gemini AI integration to doxy

[thrishank007]

Add Gemini AI integration to the doxy project.

Summary:
Integrate Gemini AI capabilities within doxy to enhance its AI-powered features and enable smarter document generation or interaction.

Requirements:

• Research Gemini AI API or SDK for compatibility with doxy
• Implement integration layer
• Add configuration options for activation and management
• Write sample usage documentation

Acceptance Criteria:

• Gemini AI features operate within doxy without breaking existing functionality
• Documentation is updated to explain how to use and configure Gemini AI integration

Additional Notes:
Consider providing samples and tests for the integration.