63934534 Add code declared role definitions.
Add implication through ContextImplication.
Merge remote-tracking branch 'origin/develop' into feature/code-declared-roles
Fixups for role contributions from extensions
Move GDrive-extension permissions into GDrive extension

* Uses extension's `ROLE_CONTRIBUTIONS`
Merge pull request #934 from reciprocity/feature/code-declared-roles

Feature/code declared roles