fix: routing behavior when $uriProtocol is QUERY_STRING

[kenjis]

Description
From https://forum.codeigniter.com/showthread.php?tid=86284&pid=406192#pid406192

When Config\App::$uriProtocol is QUERY_STRING and accessing baseURL:

• (1) Fix: the defined route / is ignored, and routed to the default controller
• (2) Fix: Debug/Toolbar/Collectors/Routes.php throws "ReflectionException: Class "Home" does not exist"

How to Reproduce

--- a/app/Config/App.php
+++ b/app/Config/App.php
@@ -59,7 +59,7 @@ class App extends BaseConfig
      *
      * WARNING: If you set this to 'PATH_INFO', URIs will always be URL-decoded!
      */
-    public string $uriProtocol = 'REQUEST_URI';
+    public string $uriProtocol = 'QUERY_STRING';
 
     /**
      * --------------------------------------------------------------------------
diff --git a/app/Config/Routes.php b/app/Config/Routes.php
index c251ec22c4..520078ff91 100644
--- a/app/Config/Routes.php
+++ b/app/Config/Routes.php
@@ -29,7 +29,7 @@ $routes->set404Override();
 
 // We get a performance increase by specifying the default
 // route since we don't have to scan directories.
-$routes->get('/', 'Home::index');
+$routes->get('/', 'Index::index');
 
 /*
  * --------------------------------------------------------------------

(1) set CI_ENVIRONMENT = production in .env, and run spark serve.
Navigate to http://localhost:8080/.
You will see the Welcome page. But it should be 404 Not Found.
Because Index::index does not exist.

(2) set CI_ENVIRONMENT = development in .env, and run spark serve.
Navigate to http://localhost:8080/.

Checklist:

• Securely signed commits
• Component(s) with PHPDoc blocks, only if necessary or adds value
• Unit testing, with >80% coverage
• User guide updated
• Conforms to style guide

[kenjis]

I don't know what is Nested (in the method name), and why
the URI path is /ci/index.php/woot?code=good#pos but $_SERVER['REQUEST_URI'] is /index.php/woot.

[MGatner]

I'm not sure either! Was that my code? It probably just means "in a subdirectory".

[kenjis]

No, not your code.