mem-agent: Add to src

mem-agent is a component designed for managing memory in Linux
environments.
Sub-feature memcg: Utilizes the MgLRU feature to monitor each cgroup's
memory usage and periodically reclaim cold memory.
Sub-feature compact: Periodically compacts memory to facilitate the
kernel's free page reporting feature, enabling the release of more idle
memory from guests.
During memory reclamation and compaction, mem-agent monitors system
pressure using Pressure Stall Information (PSI). If the system pressure
becomes too high, memory reclamation or compaction will automatically
stop.

Fixes: #10625

Signed-off-by: Hui Zhu <teawater@antgroup.com>

tests/static-checks.sh

@@ -472,6 +472,7 @@ static_check_license_headers()
 			--exclude="tools/packaging/qemu/default-configs/*" \
 			--exclude="src/libs/protocols/protos/gogo/*.proto" \
 			--exclude="src/libs/protocols/protos/google/*.proto" \
+			--exclude="src/mem-agent/example/protocols/protos/google/protobuf/*.proto" \
 			--exclude="src/libs/*/test/texture/*" \
 			--exclude="*.dic" \
 			-EL $extra_args "\<${pattern}\>" \