Add cirBTC to ETH whitelist

Son of Odinrequested to merge
cirbtc-whitelist into develop

Adds Circle Wrapped Bitcoin (cirBTC) at 0x72dfb2e44f59c5ad2bafe84314e5b99a7cd5075e to the Ethereum mainnet token whitelist with 8 decimals, verified on Etherscan: https://etherscan.io/token/0x72dfb2e44f59c5ad2bafe84314e5b99a7cd5075e

Validation: token-list lint and git diff --check passed. JSON validation confirmed the exact new entry, no duplicate address, and no changes to existing entries.

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