Started implementing jar-based(plugin) tool loading

Core#plugin:
- Plugin.java: Main framework for plugins
- OllamaTool.java: Used for annotation based loading of tools
- InjectPlugin.java: Annoataion for injecting the Plugin instance, used when annotation based loading is used
- PluginMetadata.java: metadata of the plugin, a class-reflection of plugin.json file within each plugin
- PluginLoadingException.java: Exception thrown when an error happens durring plugin loading

Display/src/main/java/me/zacharias/chat/display/Display.java

@@ -53,6 +53,8 @@ public class Display {
                 //.addFileTools(FileHandlerLocation.DATA_FILES)
                 .build());
 
+        core.enablePlugins(Core.PLUGIN_DIRECTORY);
+
         core.addTool(new TimeTool(), Core.Source.INTERNAL);
         //core.addTool(new PythonRunner(core), Core.Source.INTERNAL);
         core.addTools(new MALAPITool().getOllamaTools());