Changed command system (#304)

* Save Cacheable expansions data on shutdown

* Prepare for 1.16

* 1.16.1 is out apparently

* Further fixes, still not done

* Inline JSONMessages & fix for 1.16

* Done :O

* Done for real now, (hopefully)

* Changed to static instead of DI for plugin instance

* Cleanup

* Modified tab completions. Removed extra command.

* Apparently this is needed

* Started cleaning stuff up

basically just pushing so I can continue on laptop

* did more cleaning, probs like half way done

* more cleaning. reverted back to a min arg system somewhat similar to what frosty had, but less boilerplate.

* Started debugging and fixing runtime/compile errors

* Fixed bugs, still needs thorough testing

* Re-enable metrics

* relocated stuff again

* - Remove json message relocation
- uncomment other relocations
- reformat pom
- remove useless scope declaration
- Fix metrics constructor
- Switch commands to use inline json message

Co-authored-by: iGabyTM <contactgabytm@gmail.com>
Co-authored-by: darbyjack <admin@glaremasters.me>
Co-authored-by: PiggyPiglet <noreply@piggypiglet.me>

src/main/java/me/clip/placeholderapi/expansion/Taskable.java

@@ -23,15 +23,15 @@ package me.clip.placeholderapi.expansion;
 
 public interface Taskable {
 
-  /**
-   * Called when the implementing class has successfully been registered to the placeholder map
-   * Tasks that need to be performed when this expansion is registered should go here
-   */
-  void start();
+    /**
+     * Called when the implementing class has successfully been registered to the placeholder map
+     * Tasks that need to be performed when this expansion is registered should go here
+     */
+    void start();
 
-  /**
-   * Called when the implementing class has been unregistered from PlaceholderAPI Tasks that need to
-   * be performed when this expansion has unregistered should go here
-   */
-  void stop();
+    /**
+     * Called when the implementing class has been unregistered from PlaceholderAPI Tasks that need to
+     * be performed when this expansion has unregistered should go here
+     */
+    void stop();
 }