docs: add notes

Author: kenjis

app/Config/Autoload.php

@@ -13,7 +13,10 @@
  * can find the files as needed.
  *
  * NOTE: If you use an identical key in $psr4 or $classmap, then
- * the values in this file will overwrite the framework's values.
+ *       the values in this file will overwrite the framework's values.
+ *
+ * NOTE: This class is required prior to Autoloader instantiation,
+ *       and does not extend BaseConfig.
  */
 class Autoload extends AutoloadConfig
 {

app/Config/Modules.php

@@ -4,6 +4,11 @@
 
 use CodeIgniter\Modules\Modules as BaseModules;
 
+/**
+ * Modules Configuration.
+ *
+ * NOTE: This class is required prior to Autoloader instantiation.
+ */
 class Modules extends BaseModules
 {
     /**

app/Config/Paths.php

@@ -13,6 +13,9 @@
  *
  * All paths are relative to the project's root folder.
  *
+ * NOTE: This class is required prior to Autoloader instantiation,
+ *       and does not extend BaseConfig.
+ *
  * @immutable
  */
 class Paths