Revise JavaCPP bindings and core package

[tpietzsch]

Streamline core API and reduce redundancies in JavaCPP wrapper.
The API for creating and writing ArrayJ looks like this now:

DeviceJ device = DeviceJ.getDefaultDevice();
ArrayJ arrayJ = device.createArray(DataType.UINT8, MemoryType.BUFFER, 4, 3);
// or, alternatively:
// ArrayJ arrayJ = new ArrayJ(4, 3, 1, 2, device, DataType.UINT8, MemoryType.BUFFER);

byte[] inValues = new byte[4 * 3];
arrayJ.writeFromArray(inValues);

byte[] outValues = new byte[4 * 3];
arrayJ.readToArray(outValues);

Changes in more detail:

• cle::dType and cle::mType are represented as Java enums net.clesperanto.core.DataType and net.clesperanto.core.MemoryType

• Reduce memory copying functions in cleasperantoj.hpp to only the primitive types. The distinction between signed and unsigned is unnecessary. Corresponding Java methods are in MemoryJ instances MemoryJ.BYTE, MemoryJ.SHORT, MemoryJ.INT, MemoryJ.FLOAT. The DataType enum has a memory() method that maps to the appropriate MemoryJ instance. For example, DataType.UINT8.memory() == MemoryJ.BYTE.

• Move ArrayJ create/read/write methods into ArrayJ.

• Revise ImgLib2Converters and ImageJConverters to not go through an additional ByteBuffer. Just copy from/to primitive arrays directly.

• ArrayJ constructors can extract Device from underlying _ArrayJ directly. So we don't need the ArrayJ(_ArrayJ, DeviceJ) constructor anymore. However, this is left in for now, until we replace all the call sites in Tier1, Tier2, etc. (This should be done through gencle?)

• There is a bit of confusion of how to handle width/height/depth/dimensions of an cle::Array consistently. I'll make a separate GitHub issue about that.

[StRigaud]

However, this is left in for now, until we replace all the call sites in Tier1, Tier2, etc. (This should be done through gencle?)

Yes, I will update gencle accordingly. I will merge this along the update of gencle

Thanks!