Unknown templates during project creation

[Helveg]

When you bsb new:

(b4py9) robin@LAPTOP-JF6T3PSU:~$ bsb new
Project name [my_model]:
Config template [skeleton.yaml]:

but you can't see which templates are available. We could either:

1. List the available options
   • This doesn't scale well if there's many templates
2. Autocomplete them

• We should inform the user how to do that, show placeholder text, ...

The relevant code is in

bsb-core/bsb/cli/commands/_projects.py

Line 10 in 5dcd7bd

class ProjectNewCommand(BaseCommand, name="new"):

and

bsb-core/bsb/config/__init__.py

Line 142 in 5dcd7bd

def copy_template(self, template, output="network_configuration.json", path=None):