gpui: Add data table example

[huacnlee]

Release Notes:

• N/A

As #24260 I mentioned issue.

Make a complex data table example to test the text rendering performance.

This example also can be an example to show how to build a large data table.

cargo run -p gpui --example data_table

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I will try to do some test.

For example: With a threshold for the hold number of caches in FrameCache, and only when the threshold is greater than a certain number, some caches are released, or when a certain time has passed. I am not sure if this is feasible.

This example is added to help us to test.

[Angelk90]

@huacnlee : You can post the complete example seen in the video of #24260.

[mikayla-maki]

This looks like a cool example!