Fix: Java JAR contains native library twice

[MarkReedZ]

This PR fixes #314 by excluding the shared/ directory.

Tested with

javac -cp /usr/share/java/junit4.jar:../../build/libs/usearch-2.13.0.jar IndexTest.java
java -cp .:/usr/share/java/junit4.jar org.junit.runner.JUnitCore IndexTest

[MarkReedZ]

Note that a cleaner fix for this issue would probably be to not copy the dlls and load them from usearch/shared/

In the build.gradle we copy usearch/shared/* to ../ then in the code we load from /usearch. Instead we can remove the copying and load from /usearch/shared/

          NativeUtils.loadLibraryFromJar("/usearch/libusearch.dylib");
        } else {
          NativeUtils.loadLibraryFromJar("/usearch/libusearch.so");

[ashvardanian]

The latter sounds like a good plan. I can wait for that patch, if you want to follow up on this branch 🤗

[MarkReedZ]

Proper fix and verified the jar as in the OP.

[ashvardanian]

Do we know what this property is equal to on Windows? We should probably link to .dll there.