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-tasks.js

@@ -91,7 +91,13 @@ export function registerListTasksTool(server) {
 				log.info(
 					`Retrieved ${result.success ? result.data?.tasks?.length || 0 : 0} tasks`
 				);
-				return handleApiResult(result, log, 'Error getting tasks');
+				return handleApiResult(
+					result,
+					log,
+					'Error getting tasks',
+					undefined,
+					args.projectRoot
+				);
 			} catch (error) {
 				log.error(`Error getting tasks: ${error.message}`);
 				return createErrorResponse(error.message);