Add lifecycle management APIs

- LifeCycleService: initialization and configuration
- DeviceService: Device enumeration and VF management
- HeartbeatService: Health monitoring and status checks

These APIs provide standardized interfaces for:
- Platform initialization (Init RPC)
- Device discovery and configuration (GetDevices, SetNumVfs RPCs)
- Health monitoring (Ping RPC)

Signed-off-by: Balazs Nemeth <bnemeth@redhat.com>

Author: bn222

buf.gen.yaml

@@ -1,6 +1,6 @@
 version: v2
 plugins:
-  - remote: buf.build/protocolbuffers/go:v1.36.3
+  - remote: buf.build/protocolbuffers/go:v1.36.11
     out: gen/go
     opt: paths=source_relative
   - remote: buf.build/grpc/go:v1.5.1