Meta: Why users cannot create Issues directly

[rarkins]

Describe the proposed change(s).

Users are not allowed to create Issues directly in this repository - we ask that you create a Discussion first.

This approach is based on years of experience supporting users, and observing that 80-90% of what users think are bugs are either misunderstandings, environmental problems, or configuration errors by the users themselves. For what's left, the majority are often feature requests (unimplemented features) and not bugs (malfunctioning features).

Users collectively are terrible at judging what a bug report is, and that poor judgment left our repo full of poorly described and/or invalid bug reports. The majority of Open Source projects without this policy are also full of low quality issues, and it's a bad thing.

Importantly, any Discussion which clearly identifies a problem in Renovate and can be confirmed or reproduced will be converted to an Issue by a maintainer, so as a user finding a valid problem you don't do any extra work anyway.