Print results of `2a-emulator run` in all relevant bases

Instead of 
```
Program: 2a.asm
Time:    9us 104ns
Cycles:  100/100
State:   Running
Output:  FE: 0
         FF: 85
```

It would be nice to have:
```
Program: 2a.asm
Time:    9us 104ns
Cycles:  100/100
State:   Running
Output:  FE: 0  (0x00, 0b00000000)
         FF: 85 (0x55, 0b01010101)
```