Replace Makefile with castor.php and update workflow

A new castor.php file is introduced, replacing the existing Makefile which has been removed. This update modifies the GitHub workflows to call the appropriate Castor tasks. Minor changes are also made to existing source files and static analysis configurations to include the new castor.php file.

.github/workflows/integrate.yml

@@ -32,6 +32,7 @@ jobs:
         with:
           php-version: "8.3"
           coverage: "none"
+          tools: "castor"
 
       - name: "Checkout code"
         uses: "actions/checkout@v4"