- Rewrote plugin using RArchPlugin (decode callback)
- Matches z80 reference plugin structure
- Tested against r2 6.1.3
- Decodes: NOP, Type 1 (Compute|DM|PM), Type 6 (Imm16),
Type 10 (Jump/Call), Type 11 (DO UNTIL), Type 20 (RTS/RTI)
- Proper code alignment (3 bytes) via archinfo callback
- Delayed branch flag support