feat: implement add-task MCP command

- Create direct function wrapper in add-task.js with prompt and dependency handling

- Add MCP tool integration for creating new tasks via AI

- Update task-master-core.js to expose addTaskDirect function

- Update changeset to document the new command

mcp-server/src/tools/index.js

@@ -14,6 +14,7 @@ import { registerGenerateTool } from "./generate.js";
 import { registerShowTaskTool } from "./show-task.js";
 import { registerNextTaskTool } from "./next-task.js";
 import { registerExpandTaskTool } from "./expand-task.js";
+import { registerAddTaskTool } from "./add-task.js";
 
 /**
  * Register all Task Master tools with the MCP server
@@ -30,6 +31,9 @@ export function registerTaskMasterTools(server) {
   registerShowTaskTool(server);
   registerNextTaskTool(server);
   registerExpandTaskTool(server);
+  registerAddTaskTool(server);
+  
+  logger.info("Registered all Task Master tools with MCP server");
 }
 
 export default {