Added enablePlugin and disablePlugin, triggers events

By: Dinnerbone <dinnerbone@dinnerbone.com>

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

@@ -34,4 +34,22 @@ public interface PluginLoader {
      * @param event Event details
      */
     public void callEvent(RegisteredListener registration, Event event);
+
+    /**
+     * Enables the specified plugin
+     *
+     * Attempting to enable a plugin that is already enabled will have no effect
+     *
+     * @param plugin Plugin to enable
+     */
+    public void enablePlugin(Plugin plugin);
+
+    /**
+     * Disables the specified plugin
+     *
+     * Attempting to disable a plugin that is not enabled will have no effect
+     *
+     * @param plugin Plugin to disable
+     */
+    public void disablePlugin(Plugin plugin);
 }