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JP (HL) / (IX) / (IY) lifted as a memory-indirect jump #13

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@xusheng6

For a register-deref target, goto_or_jump() in Z80IL.py runs the operand through operand_to_il() without peel_load=True, so it emits a load:

e9   JP (HL)   ->   jump([HL].w)      # should be jump(HL)

JP (HL) jumps to the address in HL, it does not dereference it. This breaks the standard Z80 jump-table dispatch idiom.

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