feat(mcp): Add tagInfo to responses and integrate ContextGatherer

Enhances the MCP server to include 'tagInfo' (currentTag, availableTags) in all tool responses, providing better client-side context.

- Introduces a new 'ContextGatherer' utility to standardize the collection of file, task, and project context for AI-powered commands. This refactors several task-manager modules ('expand-task', 'research', 'update-task', etc.) to use the new utility.

- Fixes an issue in 'get-task' and 'get-tasks' MCP tools where the 'projectRoot' was not being passed correctly, preventing tag information from being included in their responses.

- Adds subtask '103.17' to track the implementation of the task template importing feature.

- Updates documentation ('.cursor/rules', 'docs/') to align with the new tagged task system and context gatherer logic.

mcp-server/src/tools/get-task.js

@@ -130,7 +130,8 @@ export function registerShowTaskTool(server) {
 					result,
 					log,
 					'Error retrieving task details',
-					processTaskResponse
+					processTaskResponse,
+					projectRoot
 				);
 			} catch (error) {
 				log.error(`Error in get-task tool: ${error.message}\n${error.stack}`);