arrow

GH-37835: [MATLAB] Improve `arrow.tabular.Schema` display (#37836)



### Rationale for this change

We would like to change how `arrow.tabular.Schema`s are displayed in the Command Window. Below is the current display:

```matlab
>> field1 =  arrow.field("A", arrow.time32());
>> field2 = arrow.field("B", arrow.boolean());
>>s = arrow.schema([field1 field2])

s = 

A: time32[s]
B: bool
```

This display is not very MATLAB-like.

### What changes are included in this PR?

1. Updated the display of `arrow.tabular.Schema`. Below is the new display:

```matlab
>> field1 =  arrow.field("A", arrow.time32());
>> field2 = arrow.field("B", arrow.boolean());
>> s = arrow.schema([field1 field2])

s = 

  Arrow Schema with 2 fields:

    A: Time32 | B: Boolean
```

When MATLAB is opened in desktop mode, `Schema`, `Time32`, and `Boolean` are hyperlinks users can click on to view the help text for the different class types. 

### Are these changes tested?

Yes. Added three new test cases to `tSchema.m`: 
1. `TestDisplaySchemaZeroFields`
2. `TestDisplaySchemaOneField`
3. `TestDisplaySchemaMultipleFields`

### Are there any user-facing changes?

Yes. `arrow.tabular.Schema`s will be displayed differently in the Command Window.

### Notes

Once #37826 is merged, I will rebase my changes and mark this PR as ready for review.
* Closes: #37835

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