Move ekms content into its own folder

.devcontainer/devcontainer.json

.gitlab-ci.yml

.gitmodules

docker-compose.yml

ekms/.dockerignore

ekms/.gitignore

ekms/Dockerfile

ekms/Dockerfile.debug

ekms/Makefile

ekms/api/buf.gen.yaml

ekms/api/buf.work.yaml

ekms/api/go/grpc/etsi/etsi14.pb.go

ekms/api/go/grpc/etsi/etsi14.pb.gw.go

ekms/api/go/grpc/etsi/etsi14_grpc.pb.go

ekms/api/go/rest/etsi/client/.gitignore

ekms/api/go/rest/etsi/client/.openapi-generator-ignore

ekms/api/go/rest/etsi/client/.openapi-generator/FILES

ekms/api/go/rest/etsi/client/.openapi-generator/VERSION

ekms/api/go/rest/etsi/client/.travis.yml

ekms/api/go/rest/etsi/client/README.md