tests: Add vcsbackend_stub as a new fixture Corresponding to backend_stub.

tests: Extend vcsbackend - create repo with commits Moved logic from "backend" into a function, so that it can be used for both "backend" and "vcsbackend".

Summary: Split the readme logic into sub-methods

summary: Move logic to find a readme out Created ReadmeFinder inside of model.repo. The ReadmeFinder will be evolved, so that it uses a smarter algorithm to actually find the readme file.

summary: Improve logging around README handling

css: using variables and mixins for toast component

base: add pyramid_request to tmplContext

frontend: reorganize how we handle plugins

root template: got rid of shared styles

styles: add alert styles into shadow dom