feat: add comma-separated status filtering to list-tasks

- supports multiple statuses like 'blocked,deferred' with comprehensive test coverage and backward compatibility

- also adjusts biome.json to stop bitching about templating.

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

@@ -28,7 +28,9 @@ export function registerListTasksTool(server) {
 			status: z
 				.string()
 				.optional()
-				.describe("Filter tasks by status (e.g., 'pending', 'done')"),
+				.describe(
+					"Filter tasks by status (e.g., 'pending', 'done') or multiple statuses separated by commas (e.g., 'blocked,deferred')"
+				),
 			withSubtasks: z
 				.boolean()
 				.optional()