- feat(gas): add comprehensive gas fee strategy management system
* Implement GasFeeStrategyType with Default/LowTipHighCuPrice/HighTipLowCuPrice strategies
* Add dynamic gas fee configuration per SWQOS service and trade type
* Integrate arc-swap for thread-safe strategy updates
- docs: restructure documentation with dedicated guides
* Add ADDRESS_LOOKUP_TABLE.md/CN.md for lookup table configuration
* Add NONCE_CACHE.md/CN.md for nonce management documentation
* Add TRADING_PARAMETERS.md/CN.md for comprehensive parameter guides
* Simplify main README.md with focused overview
- refactor: update all examples with new gas fee strategy integration
* Modernize 14 trading examples with consistent parameter handling
* Improve error handling and configuration management
* Enhance parallel trading implementation
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