Update C/C++ Linter Workflow (#59)

This commit updates the C/C++ Linter workflow at `.github/workflows/cpp-linter.yml`. The style is changed from `llvm` to `file` and the action ignores now also `Qt/Qt` and `build/CMakeFiles` folder that are out of the repositories changing reach. As a future restriction, this workflow is only allowed to write status and the remaining is changed to read only.

* Change style to file
* Add Qt to the ignored directories
* Add permissions accordingly for the workflow
* Add `build/CMakeFiles` to the ignore paths

.github/workflows/cpp-linter.yml

@@ -20,6 +20,12 @@ concurrency:
 env:
   QT_VERSION:     "6.2.0"
 
+permissions:
+  contents: read
+  packages: read
+  # To report GitHub Actions status checks
+  statuses: write
+
 jobs:
   cpp-linter:
 
@@ -111,16 +117,16 @@ jobs:
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
         with:
-          style: llvm #file
-          tidy-checks: boost-*,bugprone-*,performance-*,readability-*,portability-*,modernize-*,clang-analyzer-*,cppcoreguidelines-*
+          style: "file" #llvm
+          tidy-checks: "boost-*,bugprone-*,performance-*,readability-*,portability-*,modernize-*,clang-analyzer-*,cppcoreguidelines-*"
           files-changed-only: false
           lines-changed-only: false
           no-lgtm: false
           # The following value will only update a single comment
           # in a pull request's thread. Set it to false to disable the comment.
           # Set it to true to post a new comment (and delete the old comment).
           thread-comments: ${{ github.event_name == 'pull_request' && 'update' }}
-          ignore: external
+          ignore: "external|Qt|build/CMakeFiles"
 
       - name: Fail fast?!
         if: steps.linter.outputs.checks-failed > 0