Problem

Need a second AF_XDP sample equivalent to the NetMap plaintext app, plus a Docker setup for easy local testing.

Sub-tasks

• Create sample/Magma.AF_XDP.PlaintextApp - equivalent of NetMap plaintext sample
• Docker Compose file for easy local testing (veth pair, XDP program)
• Script to set up test environment on bare metal

Dependencies

Depends on: #120
Unlocks: platform I/O benchmarks (#TBD) can test AF_XDP

Phase

Phase 2 (Platform Backends & Samples)