Moving plugins into single store

Makefile

api/go/gosdn/plugin-internal/plugin-internal.pb.go

api/go/gosdn/plugin-internal/plugin-internal_grpc.pb.go

api/go/gosdn/pnd/pnd.pb.go

api/openapiv2/gosdn_northbound.swagger.json

api/proto/buf.lock

api/proto/gosdn/plugin-internal/plugin-internal.proto

api/proto/gosdn/pnd/pnd.proto

cli/adapter/PndAdapter.go

cli/cmd/prompt.go

controller/api/managedNetworkElement.go

controller/cmd/root.go

controller/controller.go

controller/northbound/server/core.go

controller/northbound/server/nbi.go

controller/northbound/server/plugin.go

controller/northbound/server/pnd.go

controller/nucleus/databasePndStore.go

controller/nucleus/memoryPluginStore.go

controller/nucleus/pluginFilesystemStore.go