Please add Comments onto PR's / Commits with details about the operation.

## New Feature

We are having an issue where settings are not being applied but are expected to be applied. There appears to be no error information available anywhere. Its not totally clear why its not working.

I know you won't always be able to provide information, such as if a suborg glob doesn't actually match then how would safe-settings be able to know that is an error? But in other cases, such as invalid settings file, it may be useful to provide more error information. Surfacing this information in an Action is ok but it would be nicer if information was attached directly to Commits / PR's in the form of Comments.

Therefore, please add:
1. A comment onto Commits / PR's which have error information whenever there is an invalid settings files in them.
2. A comment onto Commits in the default branch which lists all of the repositories that had their settings changed as a result of of the commit.

```[tasklist]

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