Add bindings for metrics functions

[gavv]

We need to add bindings for C functions roc_sender_query() (becomes RocSender.Query() in Java) and roc_receiver_query() (becomes RocReceiver.Query()).

New functions should be covered with simple tests.

Documentation for C API can be found here: https://roc-streaming.org/toolkit/docs/api/reference.html

C headers are here: sender.h, receiver.h.

[palSayan1000]

I know java but i have open multiple repositoris and did not understood anything I want to start building and start with open source can any one please guide me
I am from India in sem 1 of college one month have just passed. I see hackathons happening everywhere i am eager to learn contribute to open source. Such things when opened for the first time are very overwhelming. It would be very help full if any one could guide me

[uemerson199]

@gavv How can I contribute to it? I didn't find any information about how I can open a PR, etc. I would like to help with it.

[JebastineE]

I'd like to work on this. I'll add the Java bindings for roc_sender_query() and roc_receiver_query(), along with simple tests following the existing JNI binding patterns.