EIP-4750 Functions

Documentation for tests/osaka/eip7692_eof_v1/eip4750_functions@206854b5.

Generate fixtures for these test cases for Osaka with:

fill -v tests/osaka/eip7692_eof_v1/eip4750_functions --fork Osaka

Test cases for EIP-4750: EOF - Functions

EIP-4750 formalizes functions in the EVM object format, introducing callable units of code. Opcodes introduced: CALLF (0xE3), RETF (0xE4).