Add fuzzer for pickle module#36
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Fuzzes the CPython _pickle C module (Modules/_pickle.c). Dispatches to four operations: pickle.dumps() with protocols 0–5 over a mix of container types (bytes, str, int list, tuple, set, frozenset, bytearray, dict) built from fuzzed data; pickle.loads() driven through restricted and persistent-load Unpickler subclasses (including a fix_imports/bytes encoding variant); Pickler.dump() with memo clearing between objects; and a dumps/loads roundtrip to exercise both sides together.
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Fuzzes the CPython _pickle C module (Modules/_pickle.c). Dispatches to four operations: pickle.dumps() with protocols 0–5 over a mix of container types (bytes, str, int list, tuple, set, frozenset, bytearray, dict) built from fuzzed data; pickle.loads() driven through restricted and persistent-load Unpickler subclasses (including a fix_imports/bytes encoding variant); Pickler.dump() with memo clearing between objects; and a dumps/loads roundtrip to exercise both sides together.