EIP 7702 Implement SetCode transactions

[anvacaru]

Add EIP-7702 SetCode Transaction Type Implementation

Adding support for a new transaction type that can include signed authorizations from various accounts. Each authorization lets you set a special code (0xEF0100 || address) for said authorized account, which points to another account/SC. Later, whenever anyone interacts with the authorized account, instead of just sending funds, the system runs the contract code that was pointed to (address).

Changes include:

Key Components:

• Add SetCode transaction type with prefix 0x04
• Define SetCodeTx data structure with authorization list
• Add processing for SetCode authority lists
• Implement the delegation indicator (0xEF0100) for EOAs
• Add gas refund mechanism for existing accounts
• Delegation Resolution: When calling an account, check if its code represents a valid delegation using #isValidDelegation, and fetch the code of the delegated account.

Notable Changes:

• Add #loadAuthorities and #addAuthority operations for processing
• Implement authority recovery from message parameters
• Add verification of authority chain ID, address, and nonce
• Update the Cextra function when computing the cost of a call to also check if there is a delegation and if the delegated account is warm.
• Support account delegation and code clearing

TODO:

• Need to implement delegation resolution in CALL*/`operations
• Run conformance tests