feat(plugin): scaffold RPCP plugin loading core

- Add JarFile-based plugin.json manifest reading and validation
- Implement reflection-based plugin class instantiation (Data or no-arg constructor)
- Wrap Tool objects into OllamaFunctionTool with basic parameter/response handling
- Implement ToolArguments storage and ToolResponse record
- Extract RPCP_SOURCE constant; add plugin name validation
- Update Data interface: getLoadedPlugins() returns LoadedPlugin[]
- Fix launcher package references (me.zacharias.chat → me.neurodock)

TODO: Extract FileSystem from JAR, populate PluginMetadata, complete
OllamaFunctionArgument↔ToolArguments wrapping, invoke plugin lifecycle hooks

Signed-off-by: zacharias <alienfromdia@proton.me>

Plugin-API/src/main/java/me/neurodock/plugin/tool/ToolResponse.java

@@ -1,12 +1,14 @@
 package me.neurodock.plugin.tool;
 
-public class ToolResponse {
+public record ToolResponse(String name, String response) {
     public static ToolResponse empty(Tool tool) {
-        return new ToolResponse();
+        return new ToolResponse(tool.name(), "");
     }
 
     public static ToolResponse empty(String toolName)
     {
-        return new ToolResponse();
+        return new ToolResponse(toolName, "");
     }
+
+
 }