Move proto-kms into internal

ekms.Dockerfile

etsiqkdnclient/etsi-qkdn-client.go

go.mod

go.sum

handlers/etsi/etsi15Handler.go

internal/Dockerfile

internal/Makefile

internal/api/buf.gen.yaml

internal/api/gen/proto/go/kmsetsi/kmsetsiproto.pb.go

internal/api/gen/proto/go/kmsintercom/kmsintercom.pb.go

internal/docker-compose.yml

internal/go.mod

internal/go.sum

internal/kms/kms.go

internal/kms/kmsetsi.go

internal/kms/kmsintercom.go

internal/kms/kmspeers.go

internal/kms/module.go

internal/main_test.go