Add the title tag to the Array () definition within a schema block

[cread-creditsense]

When defining multi-dimensional arrays within a schema, the "Array ()" blocks do not currently show any attached title information about the array levels. This PR adds the contents of a title element just underneath each "Array ()" level to assist readability. This provides a layout like the following:

[adamaltman]

Nice idea.

[xYundy]

Any ETA?

[RomanHotsiy]

This is similar to https://github.com/Redocly/redoc/pull/1497

We will definitely consider this feature for this but a little bit later. Before, we want to clean up other PRs and release 2.0.

[lornajane]

Closing in favour of #1497 , but thank you very much for being part of the project (and sorry for the very, very slow response)