Fix code quality tools configuration and update documentation

phpstan.neon

@@ -5,12 +5,13 @@ parameters:
         - admin
         - wp-plugin-starter-template.php
     excludePaths:
-        - vendor
-        - node_modules
-        - tests
-        - bin
-        - build
-        - dist
+        analyseAndScan:
+            - vendor
+            - node_modules (?)
+            - tests
+            - bin (?)
+            - build (?)
+            - dist (?)
     ignoreErrors:
         - '#Function apply_filters invoked with [0-9]+ parameters, 2 required.#'
         - '#Function do_action invoked with [0-9]+ parameters, 1 required.#'