EIP-4844 Blob Validation Implementation

This PR implements missing blob gas validation for EIP-4844 and adds some checks for transaction and block validity:

Transaction Validation

• Added #isValidTransaction to check transaction validity before starting to execute it, included missing checks as defined in ethereum/execution-specs
• Implemented blob fee deduction with new #deductBlobGas operation
• Added versioned hash validation via #checkTxVersionedHashes

Block Validation

• Added #validateBlockBlobs to verify total blob count and excess blob gas
• Added state transitions via #finalizeBlockBlobs for block-level validation
• Tracks blob gas values between blocks with previousExcessBlobGas and previousBlobGasUsed cells

Gas Calculations

• Moved blob gas calculation functions from evm.md to gas.md:
  • Ctotalblob - calculates gas used per blob
  • Cbasefeeperblob - computes blob base fee
  • Cblobfee - calculates total blob fee
  • Cexcessblob - maintains excess blob gas between blocks

Error Handling

• Added EVMC_INVALID_BLOCK status code for blob validation failures

This implementation ensures that KEVM correctly rejects blocks with invalid blob gas parameters, matching Ethereum consensus rules.

The EIP-7691 from Pectra will update the values of the schedule vars added here.