FAQ and general documentation updates

We could do better clearly answering these questions in documentation:

- [ ] What's the different between `ps-rule.yaml` and baselines?
- [ ] Can baselines and `ps-rule.yaml` be used together?
- [x] How do I disable or suppress the * has not be processed warning message?
- [ ] What is the purpose of inputType pipeline parameter?
- [ ] How should I use the inputPath pipeline parameter?
- [ ] What configuration should I used for scanning a repository of templates or bicep code?
- [x] Why are not rules processed?
- [x] Exclude `bicepconfig.json`.
- [x] Exclude other files.

Also link from troubleshooting as well for questions that might seem an issue.