Spigot Timings

Adds performance tracking timings all around the Minecraft Server, and improves the usability of the /timings command

Plugins can track their own timings with CustomTimingsHandler

By: Aikar <aikar@aikar.co>

paper-api/src/main/java/org/bukkit/plugin/SimplePluginManager.java

@@ -370,6 +370,7 @@ public final class SimplePluginManager implements PluginManager {
             }
         }
 
+        org.bukkit.command.defaults.TimingsCommand.timingStart = System.nanoTime(); // Spigot
         return result.toArray(new Plugin[result.size()]);
     }