Idea: Add template engine

[ddanier]

To create config files for example

Maybe use minijinja

[ddanier]

I think a template engine should not be part of the nur core for now. The template engine b5 provides (using Jinja2) is mainly used for:

• Project templates -> nur should not provide something for this, as it is a task runner, not something to setup new projects. There are better alternatives.
• File templates in install task, for example to create config files -> Simple version of this can be done using format pattern, more complex ones should maybe use some external command

As of this I am closing this issue for now. Maybe the best would be to create a nu plugin to allow the usage of minijinja and thus the usage in nur as well. Depending on nur supporting plugins, of course. Not sure about that either.

In addition I would like to only use minijinja after version 2.0 is ready, see mitsuhiko/minijinja#418 ;-)

[ddanier]

Additional note: For config file formats one could also maybe use from yaml and to yaml or similar.