Create Template_paradigm.py

making a function call to get out_sockets allows changing the content of (in this example) `verts_out` and `faces_out` by simple assignment, instead of what i've been doing for a while.

no more
```python
outsockets[0][2] = verts_out
outsockets[1][2] = faces_out
return in_sockets, out_sockets
```
just
```
verts_out = ...
faces_out = ...
return in_sockets, out_sockets()
```