Java compatible kotlin bindings

[DariusIMP]

Adapting Zenoh-Kotlin bindings to be compatible with Java.

The features contained in this PR are the same ones from the 0.10.0-rc release of zenoh kotlin (see https://github.com/eclipse-zenoh/zenoh-kotlin/releases/tag/0.10.0-rc).

Differences:

• Replacing everything that's pure kotlin with somewhat equivalent Java compatible code:

  • Using BlockingQueue with Optional instead of Kotlin's Channels used with Coroutines
  • Replacing all Results with Exceptions throwing
  • Added "ZenohException" wrapping the existing Exceptions thrown through JNI, for better exception handling.
  • Replacing kotlin's "extension functions" String.intoKeyExpr() and String.intoSelector() by static methods on the KeyExpr and Selector classes respectively, offering a similar functionality.

• Added Java examples with pure Java code using the library.

• Updated the KDoc comments with Java code examples.