Start Support addons loader

[Euphillya]

The logic behind this dynamic loading system is as follows:

1. Extensions Folder: A specific folder (extensions) is created or used within the plugin's directory to store .jar files containing the extensions.

2. Loading the .jar Files: Each .jar file is dynamically loaded using a URLClassLoader, allowing the classes inside the file to be accessible at runtime.

3. Searching for Classes: The content of the .jar is scanned to identify classes implementing the SkylliaExtendsAddon interface.

4. Instantiating Extensions: Classes implementing the interface are dynamically instantiated using Reflection, enabling the creation of objects even if their code is unknown to the main plugin.

5. Lifecycle of Extensions:

• onLoad(): Called after instantiation to initialize the extension with a reference to the main plugin.

• onEnable(): Called after the main plugin starts, allowing the extensions to register commands, listeners, etc.

• onDisable(): Called when the main plugin shuts down to let extensions clean up their resources.

In summary, the main plugin acts as an extension manager, dynamically detecting and enabling additional functionality without integrating it directly into its core code.