Make app create `--from-template` flag optional

[lukasz-kaniowski]

In a monorepo setup we need to create an empty root repository that will have all of the p2p variables set but without any workflows defined. We could have a specific monorepo software template or alternatively don't use any of the templates. This PR makes --from-template parameter optional to enable this.

Usage

• interactive mode

• non interactive mode

  corectl app create lukasz-app-1 --tenant lukasz-app-1 --nonint