Add php doc comments for ServerTiming facade

Add php doc comments for each public function for the facade, so that there is help text along with IDE intellisense to know about that static functions it supports.

Author: johnwc

src/Facades/ServerTiming.php

@@ -4,8 +4,26 @@
 
 use Illuminate\Support\Facades\Facade;
 
+/**
+ * @method static \BeyondCode\ServerTiming\ServerTiming start(string $key) Start a unique timed event.
+ * @method static \BeyondCode\ServerTiming\ServerTiming addMetric(string $metric) Add new event with null duration.
+ * @method static bool hasStartedEvent(string $key) Check if a event has been created already.
+ * @method static \BeyondCode\ServerTiming\ServerTiming measure(string $key) Stop existing event and record its duration, else start a new event.
+ * @method static \BeyondCode\ServerTiming\ServerTiming stop(string $key) Stop a timed event and record its duration.
+ * @method static void stopAllUnfinishedEvents() Stop all running events.
+ * @method static \BeyondCode\ServerTiming\ServerTiming setDuration(string $key, float|int|callable $duration) Set the duration for an event if $duration is number, else record elapsed time to run a user function if $duration is callable.
+ * @method static float|int|null getDuration(string $key) Retrieve the duration an event has taken.
+ * @method static array events() Get the list of finished events with their associated duration.
+ *
+ * @see \BeyondCode\ServerTiming\ServerTiming
+ */
 class ServerTiming extends Facade
 {
+    /**
+     * Get the registered name of the component.
+     *
+     * @return string
+     */
     protected static function getFacadeAccessor()
     {
         return \BeyondCode\ServerTiming\ServerTiming::class;