chore: add GH workflows

Author: mychidarko

.github/workflows/php-cs-fixer.yml

@@ -0,0 +1,23 @@
+name: Check & fix styling
+
+on: [push]
+
+jobs:
+    php-cs-fixer:
+        runs-on: ubuntu-latest
+
+        steps:
+            - name: Checkout code
+              uses: actions/checkout@v2
+              with:
+                  ref: ${{ github.head_ref }}
+
+            - name: Run PHP CS Fixer
+              uses: docker://oskarstark/php-cs-fixer-ga
+              with:
+                  args: --config=.php_cs.dist.php --allow-risky=yes
+
+            - name: Commit changes
+              uses: stefanzweifel/git-auto-commit-action@v4
+              with:
+                  commit_message: 'chore: fix styling'

.github/workflows/tests.yml

@@ -0,0 +1,30 @@
+name: Run Tests
+
+on: ['push', 'pull_request']
+
+jobs:
+  ci:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os: [ubuntu-latest, macos-latest, windows-latest]
+        php: ['7.4', '8.0', '8.1', '8.2']
+
+    name: PHP ${{ matrix.php }} - ${{ matrix.os }}
+
+    steps:
+    - name: Checkout
+      uses: actions/checkout@v2
+
+    - name: Setup PHP
+      uses: shivammathur/setup-php@v2
+      with:
+        php-version: ${{ matrix.php }}
+        tools: composer:v2
+        coverage: xdebug
+
+    - name: Install PHP dependencies
+      run: composer update --no-interaction --no-progress
+
+    - name: All Tests
+      run: php vendor/bin/pest --colors=always --coverage