feat(ci): GitHub Action for QA labels

[alepouna]

Fixes #[issue_no]

Summary of Changes

Introduces a GitHub Action (created by me https://github.com/auroraisluna/qa-labels-for-prs) with the purpose of automatically labeling incoming PRs when they are marked via a QA report or by a developer as "Ready to test"

This does not change the workflow of QA, however it simply adds labels depending on the QA report.

Example:

For maintainers:
This action requires pull_requests write permission for the labels.
Action repo: https://github.com/auroraisluna/qa-labels-for-prs

Discord username (if different from GitHub): alepouna

Testing instructions

This does not require any aircraft change. Once this Action is enabled, any new QA comments in PRs will have labels.

How to download the PR for QA

Every new commit to this PR will cause a new A32NX artifact to be created, built, and uploaded.

1. Make sure you are signed in to GitHub
2. Click on the Checks tab on the PR
3. On the left side, click on the bottom PR tab
4. Click on the A32NX download link at the bottom of the page

[alepouna]

I have created this repo to demonstrate how it works: https://github.com/auroraisluna/qa-labels-for-prs-test/pull/1, feel free to explore.

[2hwk]

At least code wise looks ok, approved

[mico975]

LGTM, merge it. Will certainly make identifying the status of each PR easier than before.

[alepouna]

that was not my intention

[alepouna]

Not RTT yet, fixing a potential bug.

[alepouna]

GitHub uses v1.0.0 on my personal testing repo but it should use 1.0.2. If someone can test this out - RTM :)