feat: support standalone mode (read from file/stdin) #109
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This PR replicates detecting whether the honggfuzz runtime is driving the binary in persistent mode or the input is being delivered via a file/stdin. This allow reproducing crashes without recompiling or being automatically dropped into GDB.
See honggfuzz reference: https://github.com/google/honggfuzz/blob/8baf395e52a5d5dbb9f16642ad3be419fa6c58cb/libhfuzz/persistent.c#L117-L121