build: add Github action linters

Author: hex7c0

.github/workflows/ci.yml

@@ -0,0 +1,64 @@
+name: Everli PHP CI
+
+on:
+  workflow_dispatch:
+  pull_request:
+    paths-ignore: ['**.md']
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref || github.head_ref }}
+  cancel-in-progress: true
+
+jobs:
+  static-analysis-check:
+    name: Static Analysis for PHP ${{ matrix.php-versions }} on ${{ matrix.operating-system }}
+    runs-on: ${{ matrix.operating-system }}
+    strategy:
+      matrix:
+        operating-system: [ubuntu-latest]
+        php-versions: [7.2, 8.0]
+    env:
+      extensions: imagick, zip, pdo_mysql, sockets, pcntl, bcmath, soap, gd
+      key: extensions-v1
+      fail-fast: true
+
+    steps:
+    - name: Checkout
+      uses: actions/checkout@main
+
+    - name: Cache extensions
+      uses: shivammathur/cache-extensions@master
+      with:
+        php-version: ${{ matrix.php-versions }}
+        extensions: ${{ env.extensions }}
+        key: ${{ env.key }}
+
+    - name: Cache composer
+      id: composer-cache
+      run: echo "dir=$(composer config cache-files-dir)" >>$GITHUB_OUTPUT
+
+    - name: Cache dependencies
+      uses: actions/cache@main
+      id: cache-dependencies
+      with:
+        path: |
+          ${{ steps.composer-cache.outputs.dir }}
+          vendor
+          .cache
+        key: ${{ runner.os }}-composer-${{ hashFiles('**/composer.lock') }}
+        restore-keys: ${{ runner.os }}-composer-
+
+    - name: Setup PHP
+      uses: shivammathur/setup-php@master
+      with:
+        php-version: ${{ matrix.php-versions }}
+        extensions: ${{ env.extensions }}
+        coverage: none
+        tools: composer:v2
+
+    - name: Install dependencies
+      if: steps.cache-dependencies.outputs.cache-hit != 'true'
+      run: composer install --no-ansi --no-interaction --no-progress
+
+    - name: Run linters
+      run: composer --no-ansi test-style