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/Configurable.java

@@ -30,14 +30,14 @@ import java.util.Map;
  */
 public interface Configurable {
 
-  /**
-   * This method will be called before the implementing class is registered to obtain a map of
-   * configuration options that the implementing class needs These paths and values will be added to
-   * the PlaceholderAPI config.yml in the configuration section expansions.(placeholder
-   * identifier).(your key): (your value)
-   *
-   * @return Map of config path / values which need to be added / removed from the PlaceholderAPI
-   * config.yml file
-   */
-  Map<String, Object> getDefaults();
+    /**
+     * This method will be called before the implementing class is registered to obtain a map of
+     * configuration options that the implementing class needs These paths and values will be added to
+     * the PlaceholderAPI config.yml in the configuration section expansions.(placeholder
+     * identifier).(your key): (your value)
+     *
+     * @return Map of config path / values which need to be added / removed from the PlaceholderAPI
+     * config.yml file
+     */
+    Map<String, Object> getDefaults();
 }