Refactor config for CCT Foundry

[SyedAsadKazmi]

This pull request makes several improvements to the foundry scripting utilities and documentation for cross-chain token and pool management. The most significant changes are the removal of the HelperUtils dependency in favor of using methods directly from HelperConfig, the addition of Optimism Sepolia network support, and updates to naming conventions and documentation for consistency and clarity.

Key changes:

Helper utilities refactor and simplification:

• Removed the HelperUtils import and updated all scripts to use the new getNetworkConfig and getChain methods directly from HelperConfig, simplifying code and reducing indirection. (ccip/cct/foundry/script/AddRemotePool.s.sol, ccip/cct/foundry/script/RemoveRemotePool.s.sol, ccip/cct/foundry/script/GetCurrentRateLimits.s.sol, ccip/cct/foundry/script/AcceptAdminRole.s.sol, ccip/cct/foundry/script/ApplyChainUpdates.s.sol, ccip/cct/foundry/script/ClaimAdmin.s.sol, ccip/cct/foundry/script/DeployBurnMintTokenPool.s.sol, ccip/cct/foundry/script/DeployLockReleaseTokenPool.s.sol, ccip/cct/foundry/script/DeployToken.s.sol, ccip/cct/foundry/script/MintTokens.s.sol — [1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12] [13]

Network configuration enhancements:

• Added support for the Optimism Sepolia network in HelperConfig, including a new configuration function and handling for the associated chain ID. Also added a general getNetworkConfig function to retrieve network configurations by chain ID. (ccip/cct/foundry/script/HelperConfig.s.sol — [1] [2] [3]

Documentation and naming consistency:

• Updated all references in README.md and script output paths to use the new chain alias naming convention (e.g., avalanche_fuji instead of avalancheFuji, arbitrum_one_sepolia instead of arbitrumSepolia). This ensures consistency between code, configuration, and documentation. (ccip/cct/foundry/README.md — [1] [2] [3] [4] [5] [6] [7] [8]

These changes improve maintainability, clarity, and extensibility of the foundry scripting environment for cross-chain token operations.

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