Fixes #4396

Description

the foundry plugin now properly handles multiple addresses sharing the same ABI (e.g., different ERC20 tokens). When a deployment specifies multiple addresses for a contract, it generates unique configurations with appropriate names while maintaining the shared ABI.

e.g

// Before: Only one contract config would be generated
foundry({
  deployments: {
    ERC20: {
      DAI: '0xDA10009cBd5D07dd0CeCc66161FC93D7c9000da1',
      WETH: '0x4200000000000000000000000000000000000006'
    }
  }
})

// After: Generates unique configs for each token
// Generates:
// - ERC20_DAI with DAI address
// - ERC20_WETH with WETH address
// Both sharing the same ERC20 ABI

Changes

• Added support for named address mappings in FoundryConfig type
• Implemented contract name generation with suffixes for multiple addresses
• Added ABI sorting for consistent output
• Added test coverage for multiple address scenarios