Adding WMTS Layer Feature

[nebsar]

Prerequisites

Please fulfill the following requirements before submitting an issue to this repository.

• Check the "Common Problems" page on the WorldWind website: https://worldwind.arc.nasa.gov/java/tutorials/common-problems
• Check that your issue isn't already filed: https://github.com/NASAWorldWind/WorldWindJava/issues
• Check the WorldWind forum for common solutions: https://forum.worldwindcentral.com/forum/world-wind-java-forums

Description

Although there is WMTS layer implementation in WorldWind Android and WorldWind Kotlin, there is no WMTS layer feature in WorldWind Java

Steps to Reproduce

1. None

Expected behavior: WorldWind Java to have WMTS Layer feature

Actual behavior: WorldWind Java does not have WMTS layer feature

Reproduces how often:

Operating System and Version

Windows, Linux, MacOS

Additional Information

None