Added Cats-Effect selector-based Datagramsocket implementation for JVM

[rahulrangers]

This PR introduces a non-blocking, Selector-driven implementation of UDP sockets for the JVM.

Key Changes

New implementation

• SelectingIpDatagramSocketsProvider
  Binds UDP sockets backed by a DatagramChannel integrated with cats.effect.Selector.

• SelectingDatagramSocket
  Provides a DatagramSocket[F] implementation with mutex-guarded non-blocking I/O for read and write operations, supporting:

  • Asynchronous reads and writes via Selector
  • Standard socket options (getOption, setOption)
  • Multicast group membership (join, drop, block, unblock)