feat: Problem Matchers

[ScottBrenner]

4e7c712 previously introduced Problem Matchers to this Action, but this functionality was removed with 15421eb#diff-efc0e1791ad6067603d6250b9eca6bfa0159eb4f7ce6f65b5ffd68273a179117.

As discussed in https://github.com/ScottBrenner/cfn-lint-action/pull/33/files#r615433016:

From https://github.com/actions/toolkit/blob/master/docs/problem-matchers.md
Problem Matchers are a way to scan the output of actions for a specified regex pattern and surface that information prominently in the UI

This will display linting errors inline on pull requests, see the image in https://github.com/ScottBrenner/cfn-lint-action#github-action-for-cloudformation-linter https://github.com/ScottBrenner/cfn-lint-action/blob/90f970711aa1b19575dd9522d2340c5bca6df803/screenshot.png for an example.

Might have to defer to original implementor @softprops regarding functionality, but in addition to this cfn-lint.json file we'll need something similar to 4e7c712#diff-6f9d41d046756f0ddc2fcee0626bdb50100d12b88f293734eff742818e03efa2R7 looks like.

[softprops]

Good question. I actually didn't know what this done. We could get this working again by simply adding the file back in and it would honour the files existence and the cfn-lint package would use it. However, I honestly didn't know what this was 🤔 @ScottBrenner could you explain? If it's needed all we need to do it re-commit it back in to the root of the action and copy it over to the $PATH I think

aw shucks this was really useful. I can take a look at this again

we managed installing this before with an echo command but we should be able to do it in the update java script example as well. Here's an example from the setup-python action

[NickLiffen]

I am happy to take a look at this btw if you need 👍 I don't really know what it does but happy to help to get it done if required 👍 Or happy to review something if anyone else wants to give it a go 👍