feat(docs): Add Comprehensive Smart Wallet & Gasless Guide #802
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Added a comprehensive guide for gasless integration with Smart Wallets, covering account abstraction, implementation details, and troubleshooting common errors.
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This PR creates a foundational guide for developers transitioning to Account Abstraction (ERC-4337) on Base.
Key Concepts Covered:
Architecture: Explains the role of UserOps, Bundlers, and Paymasters in the new transaction flow.
Configuration: Details the Wagmi setup required to force the smartWalletOnly preference for Passkey testing.
Implementation: Provides a complete example of the useSendCalls hook (EIP-5792) to inject Paymaster capabilities for gasless transactions.
Troubleshooting: Dedicates a section to resolving "Preverification Gas Low" (AA21) errors caused by large Passkey signature sizes.
Why: Adoption of Smart Wallets is critical for onboarding non-crypto natives. This guide provides the missing technical link between the high-level concept of "Gasless" and the actual code required to implement it reliably.