Hardcoded paths should be removed: [Hardcoded path to ld](https://github.com/kirillzhosul/gofra/blob/7a39cb2bd534013f923e8387a5f4a8cb52fa3d3e/gofra/assembler/assembler.py#L146) [Hardcoded path to as](https://github.com/kirillzhosul/gofra/blob/7a39cb2bd534013f923e8387a5f4a8cb52fa3d3e/gofra/assembler/assembler.py#L181) [Hardcoded path to xcrun](https://github.com/kirillzhosul/gofra/blob/7a39cb2bd534013f923e8387a5f4a8cb52fa3d3e/gofra/assembler/assembler.py#L114)
