Add Example Flows to Seeder

[raphael-goetz]

For the development of the static runtime I'm currently using the Aquila import. But when using the Dynamic mode for development (Which will become more and more important) I always need to start sculptor to create flows.

I need a development seeder for real flows (in multiple variations like with static functions, all flow types and so on.)

The best way would be some sort of import. This is really important!!! (would save me hours)

[raphael-goetz]

An idea would just having a file (like in Aquila) to import flows, the seeder will read it and put it into the db