Add an option to make disassembly more forgiving

[feliam]

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For consideration...

Added "silent" to disassemble_one, disassemble_all, disassemble so it returns an INVALID when undefined opcode or a zero completed operand when no more data in bytecode.

(Also it adds a copy.copy there. May be a bug not to do it because several disassemblies? will be using the same Instruction instance? )