arrow

GH-37569: [MATLAB] Implement `isequal` for the `arrow.type.Field` MATLAB class (#37617)



### Rationale for this change

Following on to https://github.com/apache/arrow/pull/37474, https://github.com/apache/arrow/pull/37446, and https://github.com/apache/arrow/pull/37525, we should implement `isequal` for the `arrow.type.Field` MATLAB class.

### What changes are included in this PR?

1. Implemented the `isequal` method for `arrow.type.Field`

### Are these changes tested?

Yes. Add new unit tests to `tField.m`

### Are there any user-facing changes?

Yes. Users can now call `isequal` on `arrow.type.Field`s to determine if two fields are equal.

**Example**
```matlab
>> f1 = arrow.field("A", arrow.time32(TimeUnit="Second"));
>> f2 = arrow.field("B", arrow.time32(TimeUnit="Second"));
>> f3 = arrow.field("A", arrow.time32(TimeUnit="Millisecond"));

>> isequal(f1, f1)

ans =

  logical

   1

% Name properties differ
>> isequal(f1, f2)

ans =

  logical

   0

% Type properties differ
>> isequal(f1, f3)

ans =

  logical

   0
```

### Future Directions

1. #37568
2. #37570

* Closes: #37569

Authored-by: Sarah Gilmore <sgilmore@mathworks.com>
Signed-off-by: Kevin Gurney <kgurney@mathworks.com>