Add the possibility to add new projects, make the framework more extensible.

[ruseinov]

Current implementation makes a lot of assumptions about the app implementation, it does support scaffolding for cosmos-based app and works on localhost only.

It would be nice to make these things configurable, be able to add more scaffolding for other apps, for example weave, and have docs for that.

It would also be nice to make more of these things configurable through the chainkit.yaml