Add example on how to use Logic Array assignment would be good

### Motivation

Add a simple example to website https://intel.github.io/rohd-website/docs/logic-arrays/ on how to use array assignment, users are confuse with:

```dart
logicArray.elements[0]; // a[0]
```

Probably, example of assignment in conditionals also would be helpful. https://github.com/intel/rohd/discussions/425

### Desired solution

Improve documentation

### Alternatives considered

_No response_

### Additional details

_No response_