Add linter.yml

Perform a check on the coding style of all files added to the master
branch through a pull request. Performed through Github Actions and
Super-linter.

.github/workflows/linter.yml

@@ -0,0 +1,27 @@
+name: Linter
+
+on:
+  push:
+    branches-ignore: [master, main]
+  pull_request:
+    branches: [master]
+
+jobs:
+  build:
+    name: Linter
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout Code
+        uses: actions/checkout@v3
+        with:
+          # Full git history is needed to get a proper list of changed files within `super-linter`
+          fetch-depth: 0
+
+      - name: Lint Code Base
+        uses: github/super-linter@v4
+        env:
+          # Don't check already existent files
+          VALIDATE_ALL_CODEBASE: false
+          DEFAULT_BRANCH: master
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}