refactor: redesign plugin system and enhance message handling

- Move plugin and tool-related classes to a dedicated `Plugin-API` module.
- Introduce a new plugin lifecycle (`onInit`, `onEnable`, `onDisable`) and a more robust `Tool` API.
- Refactor `Core` to use `PrintAdvanceMessageHandler` for improved handling of assistant messages, tool responses, and errors.
- Rename `PluginLoader` to `Loader` and migrate it to `me.zacharias.chat.plugin.loader`.
- Update build configurations and Java toolchains across modules.
- Clean up obsolete plugin annotations and interfaces in the `Core` module.

settings.gradle

@@ -1,4 +1,4 @@
-rootProject.name = 'AI-test'
+rootProject.name = 'neurodock'
 include 'API', 'Core', 'Display', 'launcher'
 
 
@@ -12,4 +12,5 @@ include 'MALAPITool'
  */
 include 'GeniusAPI'
 
-include 'WikipediaTool'
+include 'WikipediaTool'
+include 'Plugin-API'