Looks for a file at the specified
path in the resource and returns a Bytes
that lets you directly access the data in memory.
The data is always followed by a zero byte, so you can safely use the data as a C string. However, that byte is not included in the size of the GBytes.
For uncompressed resource files this is a pointer directly into the resource bundle, which is typically in some readonly data section in the program binary. For compressed files we allocate memory on the heap and automatically uncompress the data.
lookup_flags controls the behaviour of the lookup.
A pathname inside the resource
Bytes or null on error. Free the returned object