feat: implement show-task MCP command

- Create direct function wrapper in show-task.js with error handling and caching

- Add MCP tool integration for displaying detailed task information

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

- Update changeset to document the new command

- Follow kebab-case/camelCase/snake_case naming conventions

mcp-server/src/tools/index.js

@@ -11,6 +11,7 @@ import { registerUpdateTool } from "./update.js";
 import { registerUpdateTaskTool } from "./update-task.js";
 import { registerUpdateSubtaskTool } from "./update-subtask.js";
 import { registerGenerateTool } from "./generate.js";
+import { registerShowTaskTool } from "./show-task.js";
 
 /**
  * Register all Task Master tools with the MCP server
@@ -24,8 +25,9 @@ export function registerTaskMasterTools(server) {
   registerUpdateTaskTool(server);
   registerUpdateSubtaskTool(server);
   registerGenerateTool(server);
+  registerShowTaskTool(server);
 }
 
 export default {
   registerTaskMasterTools,
-};
+};