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

Core/src/test/java/plugin/Tool.java

@@ -0,0 +1,34 @@
+package plugin;
+
+import me.zacharias.chat.ollama.OllamaFunctionArgument;
+import me.zacharias.chat.ollama.OllamaFunctionTool;
+import me.zacharias.chat.ollama.OllamaPerameter;
+import me.zacharias.chat.ollama.OllamaToolRespnce;
+import me.zacharias.chat.plugin.annotation.OllamaTool;
+import me.zacharias.chat.plugin.annotation.injectons.InjectPlugin;
+
+@OllamaTool
+public class Tool extends OllamaFunctionTool {
+    @InjectPlugin(classType = Test.class)
+    Test core;
+
+    @Override
+    public String name() {
+        return "";
+    }
+
+    @Override
+    public String description() {
+        return "";
+    }
+
+    @Override
+    public OllamaPerameter parameters() {
+        return null;
+    }
+
+    @Override
+    public OllamaToolRespnce function(OllamaFunctionArgument... args) {
+        return null;
+    }
+}