adding PHP code scanning

Author: Sief-fouad12

.github/workflows/php-code_scanning.yml

@@ -0,0 +1,18 @@
+name: Static Code Security Analysis (psalm)
+
+on:
+  push:
+    branches: [ develop-retail, main ]
+  pull_request:
+    branches: [ develop-retail, main ]
+
+jobs:
+  analyze:
+    permissions:
+      actions: read
+      contents: read
+      security-events: write
+    uses: lightspeed-security/code-scanning-workflows/.github/workflows/psalm-php.yml@main
+    with:
+      composer_ignore_platform_reqs: 'true'
+      run: composer remove lightspeedhq/our-private-dependency --no-scripts --no-progress --ignore-platform-reqs