Adds Test Action to GitHub Actions

[JPRuskin]

Description Of Changes

Adds a new workflow for testing Quickstart Guide before merging any pull requests.

Please go and have a look at the result here and see if there's anything you'd like to change. This PR is in draft until folk have had a chance to have a look, at which point I'll squash things and fixup the commit history a little.

Expectations:

• Testing should run before a PR is mergeable
• Tests should run on Windows 2019 and Windows 2022
• All Pester tests should pass
• We should test self-signed certificates, as well as regular certificates, and wildcards

Motivation and Context

We want to provide more automated testing, to ensure issues are caught before things are merged in.

Big Change Notes

For those reading this who frequently (or less frequently) use the Quickstart Guide, here is a list of the biggest scary changes:

• We no longer check and exit if we're not in ConsoleHost (e.g. ISE). This is due to remoting also not being ConsoleHost. I have tested that this all works in ISE.
• We now only store one copy of the certificate, in TrustedPeople. There should no longer need to be a copy in My.
• There's an option to -SkipBrowserLaunch added to Set-SSL. That will automatically happen when the user is not in ConsoleHost, too (e.g. remoting or in ISE).

Testing

1. Run on jpruskin/choco-quickstart-guide as a dispatch
2. Run on jpruskin/choco-quickstart-guide as a response to a PR being opened / updated
3. ~Run on jpruskin/choco-quickstart-guide with a non-write user PR~

Change Types Made

• ~[ ] Bug fix (non-breaking change).~
• [x] Feature / Enhancement (non-breaking change).
• ~[ ] Breaking change (fix or feature that could cause existing functionality to change).~
• ~[ ] Documentation changes.~
• [x] PowerShell code changes.

Change Checklist

• ~[ ] Requires a change to the documentation.~
• ~[ ] Documentation has been updated.~
• ~[ ] Tests to cover my changes, have been added.~
• [x] All new and existing tests passed?

Related Issue

Fixes #253

[JPRuskin]

Looks like I'm going to need to set some secrets before this can merge! Didn't expect it to try and run the actions -interesting.

Ah, but I don't have permissions. May need Stevie, here?

[github-actions[bot]]

C4bVerification-Win2019Datacenter-single

104 tests   104 :white_check_mark:  23s :stopwatch:  14 suites    0 :zzz:   4 files      0 :x:

Results for commit 9b1cd877.

:recycle: This comment has been updated with latest results.

[steviecoaster]

This seems fine!