Add pushdata_opcodes handling ✅

[jsandinoDev]

• ✅ issue #180
• ✅ follows contribution guide
• ✅ code change includes tests

1. Rename the src/opcodes/utils to src/opcodes/utils_opcodes.cairo this is to avoid confusion in imports and uses.
2. Create the is_push_opcode function to validate the push_data_opcodes.
3. Create the opcode_push to handle the 3 cases of OP_PUSHDATA1, OP_PUSHDATA2 && OP_PUSHDATA4.
4. Use the logic of engine.pulldata to validate the correct bytes to skip.
5. Add the validation in the Engine.cairo in the function Engine && Step (Please review this).
6. Add test for the 'OP_0 OP_IF OP_PUSHDATA1 0x4c 0x8181...8181 OP_ENDIF OP_1'.

Closes #180

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[jsandinoDev]

Thanks @b-j-roberts! I hope to be able to continue collaborating in the future in this project!