Support generating helper files for real-time facades (#1455)

* Support generating helper files for real-time facades

Add changelog entry for real-time facades support

Mention real-time facades support in readme

Fix code style

Import

* Remove useless assertions

We cannot 100% control the output file has only the real-time facades, anything else can be in the final output

tests/stubs/facade-0e0385307adf5db34c7986ecbd11646061356ec8.php

@@ -0,0 +1,21 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Facades\Illuminate\Foundation\Exceptions;
+
+use Illuminate\Support\Facades\Facade;
+
+/**
+ * @see \Illuminate\Foundation\Exceptions\Handler
+ */
+class Handler extends Facade
+{
+    /**
+     * Get the registered name of the component.
+     */
+    protected static function getFacadeAccessor(): string
+    {
+        return 'Illuminate\Foundation\Exceptions\Handler';
+    }
+}

tests/stubs/facade-9431b04ec1494fc71a1bc848f020044aba2af7b1.php

@@ -0,0 +1,21 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Facades\App\Exceptions;
+
+use Illuminate\Support\Facades\Facade;
+
+/**
+ * @see \App\Exceptions\Handler
+ */
+class Handler extends Facade
+{
+    /**
+     * Get the registered name of the component.
+     */
+    protected static function getFacadeAccessor(): string
+    {
+        return 'App\Exceptions\Handler';
+    }
+}