Include body, message and stack with every error if present

For use in new app

Raises PRs and includes warning if lock file updates fail and release timestamp is greater than a day old.

Closes #2233

Raises an additional log file warning whenever lock file errors persist for a day or longer. The idea of this is that temporary errors - e.g. caused by npmjs itself - should not disturb the user. 1 day seems like a reasonable time for multiple attemps to be made first, assuming it has been scheduled. Once this is tested in production for a little while and no unexpected problems, it will be converted to actually raise a config warning issue in the repo to get user attention.

This reverts commit 09978ae8.

Added permission checking on `initRepo` which, in case of an error, throws a clear message (`The token doesn't have the write permissions to the repository`)

Closes #509 

If attempting to create a branch and it already exists, or attempting to update a branch and it no longer exists, then we abort.

feat: stringify unknown errors for better visibility

We don’t want npmjs 5xx errors to cause config validation Issues in repositories.

Closes #1388

This PR updates Renovate to detect config validation problems and (1) stop processing, and (2) either raise an Issue if already onboarded, or (2) update the onboarding PR to reflect the error if still onboarding.

Closes #1300 

Repository logic code has been rearranged for better logic and file separation.

Closes #654