New feature of displaying OccurrenceTimeIndex

[ARCJ137442]

New Features

• Added a function Print for displaying OccurrenceTimeIndex
• Added corresponding command *occurrence_time_index to the ONA Shell

Preview

[...]> ./NAR shell

a. :|:
Input: a. :|: occurrenceTime=1 Priority=1.000000 Stamp=[1] Truth: frequency=1.000000, confidence=0.900000

b. :|:
Input: b. :|: occurrenceTime=2 Priority=1.000000 Stamp=[2] Truth: frequency=1.000000, confidence=0.900000

c. :|:
Input: c. :|: occurrenceTime=3 Priority=1.000000 Stamp=[3] Truth: frequency=1.000000, confidence=0.900000

*occurrence_time_index
printing occurrence time index content:
0: (a &/ c)
1: (b &/ c)
2: ((a &/ b) &/ c)
3: c
4: (a &/ b)
5: b
6: a
index print finish