Enhance Model Support with Deepseek Reasoner Integration

[melvn]

Add Deepseek Reasoner Support for Enhanced Smart Contract Analysis

Changes Made

• Added Deepseek Reasoner integration for improved vulnerability detection
• Implemented dual model support for flexible model selection
• Enhanced pricing calculations to support both model families
• Updated UI to support model selection across providers
• Optimized model routing based on name prefix

Technical Details

• Added Deepseek client support in model.py alongside existing functionality
• Updated UI dropdowns to include Deepseek model options
• Enhanced gpt_usage() with Deepseek's competitive pricing structure
• Added Deepseek model options to argument parsers
• Implemented intelligent model routing based on name prefix

Benefits

• Access to Deepseek's specialized reasoning capabilities, the first instance of a reasoning model being applied to smart contract auditing
• Extremely cost effective token costs
• Flexible model selection based on specific use cases
• Maintained compatibility with existing workflows and existing UI

Documentation

Updated README.md with:

• New model option of Deepseek Reasoner
• Multi-provider API setup instructions
• Updated usage examples and pricing information