[lkubb]

What does this PR do?

Adds support for authentication via GitHub App credentials directly (AppID/ClientID + private key), without needing actions/create-github-app-token or similar.

Merge requirements satisfied?

[NOTICE] Bug fixes or new features require tests.

• Docs
• Changelog - https://salt-extensions.github.io/salt-extension-copier/topics/documenting/changelog.html#procedure
• Tests written/updated

Commits signed with GPG?

Yes

[codecov]

Codecov Report

❌ Patch coverage is 97.44186% with 11 lines in your changes missing coverage. Please review.
✅ Project coverage is 95.90%. Comparing base (5ae9cd8) to head (9de9bf8).

Files with missing lines	Patch %	Lines
tests/support/github/base.py	84.31%	5 Missing and 3 partials ⚠️
tests/support/github/routes/app.py	90.32%	2 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #40      +/-   ##
==========================================
+ Coverage   95.83%   95.90%   +0.07%     
==========================================
  Files         139      143       +4     
  Lines        8385     8799     +414     
  Branches      618      647      +29     
==========================================
+ Hits         8036     8439     +403     
- Misses        296      303       +7     
- Partials       53       57       +4     

Flag	Coverage Δ
Linux	95.90% <97.44%> (+0.07%)	⬆️
macOS	95.90% <97.44%> (+0.07%)	⬆️
project	93.21% <100.00%> (+0.18%)	⬆️
py310	87.23% <91.39%> (+0.20%)	⬆️
py311	87.23% <91.39%> (+0.20%)	⬆️
py314	95.86% <97.43%> (+0.07%)	⬆️
salt_3006_27	87.23% <91.39%> (+0.20%)	⬆️
salt_3008_2	95.86% <97.43%> (+0.07%)	⬆️
tests	97.44% <96.74%> (-0.05%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ View full report in Codecov by Harness.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.