Add Shibaswap V2 Protocol Implementation

[VAIBHAVJINDAL3012]

Description:

# Description

Added Shibaswap V2 protocol implementation as a direct clone of Uniswap V3, since Shibaswap V2 is a fork of Uniswap V3. The implementation includes:

- Core state management and swap logic
- Fee tier definitions matching Uniswap V3
- State decoding functionality
- Comprehensive test coverage

## Changes Made

1. Created new directory `src/evm/protocol/shibaswap_v2/` with:
   - `mod.rs`: Module definition and exports
   - `enums.rs`: Fee tier definitions
   - `state.rs`: Core state and swap logic
   - `tycho_decoder.rs`: State decoding logic

2. Added shibaswap_v2 module to `src/evm/protocol/mod.rs`

3. Implemented core functionality:
   - ShibaswapV2State struct with full Uniswap V3 compatibility
   - Fee tiers matching Uniswap V3 specification
   - State transitions and swap calculations
   - Protocol simulation traits

4. Added comprehensive test coverage:
   - State transitions
   - Fee calculations
   - Swap simulations
   - Tick management
   - Decoder functionality

## Testing

All tests are passing:
- 11 tests covering core functionality
- Includes edge cases and error conditions
- Full test coverage for state transitions and decoding

## Dependencies

Uses existing utilities:
- tycho_common for core types
- alloy::primitives for U256
- Existing Uniswap math utilities