CI setup

.github/workflows/php-linter.yml

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+name: PHP Linter
+
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+    types: [opened, synchronize, reopened, ready_for_review]
+
+jobs:
+  php-linter:
+    runs-on: ubuntu-latest
+    if: github.event.pull_request.draft == false
+
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          repository: ${{ github.event.client_payload.pull_request.head.repo.full_name }}
+          ref: ${{ github.event.client_payload.pull_request.head.ref }}
+
+      -   name: Setup PHP
+          uses: shivammathur/setup-php@v2
+          with:
+            php-version: 8.0
+            coverage: none
+            tools: parallel-lint
+
+      -   name: Lint PHP
+          run: composer exec --no-interaction -- parallel-lint bin/ lib/ tests/

.github/workflows/static-analysis.yml

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+name: Static Analysis
+
+on:
+    push:
+        branches:
+            - main
+    pull_request:
+        types: [opened, synchronize, reopened, ready_for_review]
+
+jobs:
+    phpstan:
+        name: phpstan static code analysis
+        runs-on: ${{ matrix.os }}
+
+        strategy:
+            matrix:
+                include:
+                    -   os: ubuntu-latest
+                        php-version: '8.0'
+                    -   os: ubuntu-latest
+                        php-version: '8.1'
+                    -   os: ubuntu-latest
+                        php-version: '8.2'
+                    -   os: ubuntu-latest
+                        php-version: '8.3'
+
+        steps:
+            -   name: Checkout
+                uses: actions/checkout@v4
+
+            -   name: Setup PHP
+                uses: shivammathur/setup-php@v2
+                with:
+                    php-version: ${{ matrix.php-version }}
+                    extensions: gd, intl, pdo_mysql
+                    coverage: none # disable xdebug, pcov
+
+            -   name: Composer install
+                uses: ramsey/composer-install@v2
+                with:
+                    composer-options: '--ansi --prefer-dist'
+
+            -   name: Run phpstan analysis
+                run: vendor/bin/phpstan analyse --ansi

.github/workflows/unit-tests.yml

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+name: Unit tests
+
+on:
+    push:
+        branches:
+            - main
+    pull_request:
+        types: [opened, synchronize, reopened, ready_for_review]
+
+jobs:
+    phpunit:
+        runs-on: ${{ matrix.os }}
+
+        strategy:
+            matrix:
+                include:
+                    -   os: ubuntu-latest
+                        php-version: '8.0'
+                    -   os: ubuntu-latest
+                        php-version: '8.1'
+                    -   os: ubuntu-latest
+                        php-version: '8.2'
+
+        steps:
+            -   name: Checkout
+                uses: actions/checkout@v4
+
+            -   name: Setup PHP
+                uses: shivammathur/setup-php@v2
+                with:
+                    php-version: ${{ matrix.php-version }}
+                    extensions: gd, intl, pdo_mysql
+                    coverage: none # disable xdebug, pcov
+
+            -   name: Composer install
+                uses: ramsey/composer-install@v2
+                with:
+                    composer-options: '--ansi --prefer-dist'
+
+            -   name: Setup Problem Matchers for PHPUnit
+                run: echo "::add-matcher::${{ runner.tool_cache }}/phpunit.json"
+
+            -   name: Run unit tests
+                run: vendor/bin/phpunit tests/ --colors=always