doc: update doc style for sonnet

BallanceTasSonnet/python/blctas/ballance.py

@@ -0,0 +1,9 @@
+from pathlib import Path
+
+
+def launch_game(game_path: Path) -> None:
+    """
+    Launch given Ballance game and wait until it quit.
+    """
+    pass
+

BallanceTasSonnet/python/blctas/tasfile.py

@@ -1,4 +1,4 @@
-import _blctas.tasfile
+import _blctas # type: ignore
 
-if __name__ == '__main__':
-    print(dir(_blctas))
+from _blctas.tasfile import TasKey, TasFile # type: ignore
+from _blctas.tasfile import create, load, save # type: ignore