Add Command to seeds

[eefahd]

If user made migrate refresh or exported the model and imported it in another database, he can not use the model in laraflat UI (for example: for making relations) because it does not exist in command table in the database. This update will make the project add Command to seeds file when making new admin_model, so the user can use it later.

//TODO:

• Add menus to seeds.
• Add relations to seeds.
• Include seeds files within exported model files.