feat: add fix-magento action (#86)

fix-magento-install/README.md

@@ -0,0 +1,32 @@
+# Fix Magento
+
+A Github Action that fixes Magento before `composer install`. 
+
+> You probably only need this action if you're working on a Magento extension. However, if you're working on a Magento store and your CI pipeline breaks, this is probably a good first place to look for corrective measures to take.
+
+## Inputs
+
+See the [action.yml](./action.yml)
+
+## Usage
+
+```yml
+name: Fix Magento Install
+
+on:
+  push:
+    branches:
+    - main
+  pull_request:
+    branches:
+    - main
+
+jobs:
+  fix:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v3
+    - uses: graycoreio/github-actions-magento2/fix-magento-install@main
+      with:
+        magento_directory: path/to/magento
+```