Add GutHub actions

Author: Asisyas

.github/workflows/.editorconfig

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+[{*.yaml,*.yml}]
+indent_size = 2

.github/workflows/ci.yaml

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+name: Plugin CI
+on:
+  push:
+    branches: [ 'master' ]
+  pull_request:
+
+env:
+  PHP_CS_FIXER_IGNORE_ENV: 1
+  XDEBUG_MODE: coverage
+
+jobs:
+  tests:
+    name: "Tests ${{ matrix.php-version }} deps ${{ matrix.dependency-versions }}"
+    runs-on: ubuntu-22.04
+
+    strategy:
+      fail-fast: false
+      matrix:
+        # normal, highest, non-dev installs
+        php-version: [ '8.2' ]
+        dependency-versions: [ 'highest' ]
+        include:
+          # testing lowest PHP version with the lowest dependencies
+  #        - php-version: '8.2'
+  #          dependency-versions: 'lowest'
+
+          # testing dev versions with the highest PHP
+          - php-version: '8.2'
+            dependency-versions: 'highest'
+
+    steps:
+      - name: "Checkout code"
+        uses: "actions/checkout@v2"
+
+      - name: "Install PHP"
+        uses: "shivammathur/setup-php@v2"
+        with:
+          coverage: "none"
+          php-version: "${{ matrix.php-version }}"
+
+      - name: "Composer install"
+        uses: "ramsey/composer-install@v2"
+        with:
+          dependency-versions: "${{ matrix.dependency-versions }}"
+          composer-options: "--prefer-dist --no-progress"
+
+      - name: Run tests
+        run: composer run test