ktorbase info marker in generated projects

[weickmanna]

It would be great to have a ktorbase info meta data file in the generated project, telling the ktorbase commit id that the project was generated from / most recently updated with. If there is a tag on that commit, the tag should also be included in the file.

When we then start to maintain a change log on GitHub, it will be easier to figure out the necessary changes when updating an existing project, especially when it is multiple versions behind already.