Subspace templates

[techsmyth]

WIP - see https://alkem.io/building-alkemio-org/challenges/technicaldesigns-9853/collaboration/subspacetemplates

Bootstrap:

• Takes care of populating the platform default templates if they are not already set

To test:

• use the createTemplateFromCollaboration mutation to create a new template in the specified TemplatesSet in the TemplatesManager
• set the template created as one of the platform defaults or from the space
• create a new subspace using that template

Notes

• No longer support creating new innovation flow templates
• Do not support removing a template from a TemplateDefault: once it is set then always set