Expose as artifact on Bitwig Public Maven repo

[jbhurruth]

Would it make sense to allow this to be imported via maven for people working on extensions?

Some of the framework classes seem useful so I attempted to import it as follows without success:

<dependency> <groupId>com.bitwig.extensions</groupId> <artifactId>bitwig-extensions</artifactId> <version>3.1.2</version> </dependency>

[abique]

See https://github.com/bitwig/bitwig-extensions/blob/api-17/pom.xml#L12