Add scripts descriptions

composer.json

@@ -115,5 +115,13 @@
             "phpcs",
             "phpunit"
         ]
+    },
+    "scripts-descriptions": {
+        "all-tests": "Runs all available tests.",
+        "psalm": "Runs static analysis.",
+        "phpunit": "Runs unit tests.",
+        "cs": "Checks that the code conforms to the coding standard.",
+        "cs-fix": "Automatically correct coding standard violations.",
+        "tests": "Checks coding style and runs unit tests."
     }
 }