feat(get-composer-version): create new action (#145)

This creates a new A Github Action that determines the currently installed version of Composer.

Co-authored-by: Vitaliy Golomoziy <vitaliy.golomoziy@gmail.com>

.github/workflows/_internal-get-composer-version.yaml

@@ -0,0 +1,39 @@
+name: Get Composer Version
+
+on:
+  push:
+    branches:
+    - main
+    - testing
+    paths:
+    - ".github/workflows/_internal-get-composer-version.yaml"
+    - "get-composer-version/**"
+    - "!(**/*.md)"
+  pull_request:
+    branches:
+    - main
+    paths:
+    - ".github/workflows/_internal-get-composer-version.yaml"
+    - "get-composer-version/**"
+    - "!(**/*.md)"
+
+jobs:
+  get-composer-version:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - name: Set PHP Version
+        uses: shivammathur/setup-php@v2
+        with:
+          php-version: 8.1
+          tools: composer:v2.4.2
+      
+      - uses: ./get-composer-version
+        id: composer-version
+
+
+      - name: Fail if versions do not match
+        if: steps.composer-version.outputs.version != '2.4.2'
+        shell: bash
+        run: echo "${{ steps.composer-version.outputs.version }}" && exit 1
+