feat: GitHub app support (#75)

* remove code metrics

* add test environment imput

* fetch Github access token based on app key

* build actions code

* fix path to fetch token

* build new Github actions version

* refactor request to graphql API and add tests

Author: vitaliimelnychuk

.github/workflows/code-metrics.yml

@@ -59,3 +59,5 @@ jobs:
           minimum-ratio: 0
           send-summary-comment: true
           show-annotations: "warning"
+        env:
+          BARECHECK_GITHUB_APP_TOKEN: ${{ secrets.BARECHECK_GITHUB_APP_TOKEN }}