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GH-36735 : Add `TimeUnit` and `TimeZone` to the `arrow.type.TimestampType` display (#36871)



### Rationale for this change

The `arrow.type.TimestampType` display should include the `TimeUnit` and `TimeZone` properties. Right now we only display the `ID` property: 

```matlab
>> type = arrow.type.timestamp(TimeUnit="Second", TimeZone="America/Anchorage")

type = 

  TimestampType with properties:

    ID: Timestamp
```
We should show the other two properties in the display.

### What changes are included in this PR?

Modified the display of `TimestampType`:

```matlab
>> type = arrow.type.timestamp(TimeUnit="Second", TimeZone="America/Anchorage")

type = 

  TimestampType with properties:

          ID: Timestamp
    TimeUnit: Second
    TimeZone: "America/Anchorage"

```
Now `TimeUnit` and `TimeZone` are included.

### Are these changes tested?

Added a test case to `tTimestampType` called `Display`. It verifies `TimestampType` objects are displayed correctly in the Command Window.

### Are there any user-facing changes?

Yes, users will see the new display.

* Closes: #36735

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