Add NIE

In the context of #203

we need to implement modes 23 and 33.

| # | Event Start | Event Start End | Tear Down | How to Signal | Comment |
| - | ----------- | ------------------ | ---------- | -------------- | ---------- |
| 1 | Before Step | AFTER/DURING Step | After step | NON-INTERRUPTIVE(33) | Current behavious : We do not care when exactly but the next step waits for the event to finish |
| 2 | Before Step | Before Step | After step | NON-INTERRUPTIVE(23) | SYNCHRONEOUS : No matter if the even is sychroneous or not |

| Option | Current | Alternative 1 |
| ------- | ------- | ------------- |
| 1 | 33 | WATA |
| 2 | 23 | WBTA |
| 3 | 22 | WBTB |
| 4 | 20 | WBTS |
| 5 | 20 | WATS |
| 5 | 00 | WSTS |

Start by reviewing issue #203 for the context of NIE and the merged pull request #199 to understand what work has already moved elsewhere. Then locate the TestNG plugin entry points for event modes 23 and 33 and verify the implementation against the timing and signaling behavior in the issue tables. Done means both modes are implemented and their behavior is covered by the project's tests.

Written by the indexing model from the issue text.