Support scalar indices and values in `put()`

**Current Problem**
When using the mathematical function `put()` with a scalar index, a `.resize()` is required, like this:

```
modified_array = put(old_array, index.resize(1), new_value.resize(1))
```

**Proposed Solution**
It would be nice if scalar values were accepted for the `indices` and `values` arguments.

**Alternatives Considered**
If it's too hard or costs too much performance, documenting this case in the API reference would be helpful.

**Additional context**
Numpy does accept scalars in the corresponding function:
```
arr = np.arange(5)
np.put(arr, 0, 5)
print(arr)
# Outputs [5 1 2 3 4]
```