Move github app HTML templates to templates folder

[Waterdrips]

Description

The html templates for the github app creation helper have been moved into ./templates/github/ so a user can avoid copying extra files/folders if using ofc-bootstrap outside the clone dir.

Fixes #202

Signed-off-by: Alistair Hey alistair@heyal.co.uk

How Has This Been Tested?

This was tested by building and running the create-github-app command and generating a github app

Checklist:

I have:

• [x] checked my changes follow the style of the existing code / OpenFaaS repos
• [ ] updated the documentation and/or roadmap in README.md
• [x] read the CONTRIBUTION guide
• [x] signed-off my commits with git commit -s
• [ ] added unit tests

[alexellis]

I feel like this is a core part of the package, but I see the point so will merge it for usability in pipelines.