refs https://github.com/TryGhost/Ghost-Release/issues/24
- differentiate between
1. original package.json version (can contain pre and build suffix)
2. full package.json version X.X.X-{pre} (optional)
3. safe package.json version X.X (major+minor)
refs #9178
- we have to take care that we don't end up in circular dependencies
- e.g. API requires UrlService and UrlService needs to require the API (for requesting data)
- update the references
- we would like to get rid of the utils folder, this is/was the most complicated change
refs #9178
- move express apps to one place (called `web`)
- requires https://github.com/TryGhost/Ghost-Admin/pull/923
- any further improvements are not part of this PR
- this PR just moves the files and ensures the paths are up-to-date