arrow

GH-36853: [MATLAB] Add utility to create proxies from existing `arrow::DataType` objects (#36873)



### Rationale for this change

There will be many places in the MATLAB interface code base in which we will have to wrap an `arrow::DataType` object within a subclass of `arrow::matlab::type::proxy::Type`. To avoid code duplicaiton, we should add a  utility function called `wrap` that accepts a pointer to an `arrow::DataType` object and returns a pointer to a  `arrow::matlab::type::proxy::Type` object. 

### What changes are included in this PR?

1. Added a new function with the following signature:

```cpp
arrow::Result<std::shared_ptr<arrow::matlab::type::proxy::Type>> wrap(const std::shared_ptr<arrow::DataType>& datatype);
```

2.  Updated the `type` methods of `arrow::matlab::type::proxy::Field` and `arrow::matlab::array::proxy::Array` to use `wrap`.

### Are these changes tested?

No new tests needed.

### Are there any user-facing changes?

No

* Closes: #36853

Lead-authored-by: Sarah Gilmore <sgilmore@mathworks.com>
Co-authored-by: sgilmore10 <74676073+sgilmore10@users.noreply.github.com>
Co-authored-by: Sutou Kouhei <kou@cozmixng.org>
Signed-off-by: Kevin Gurney <kgurney@mathworks.com>