Make triangulation a zero-copy pure function

src/rpt/__init__.py

@@ -3,7 +3,7 @@ from __future__ import annotations
 from collections.abc import Sequence
 from typing import TYPE_CHECKING
 
-from ._core import Camera, Triangulator
+from ._core import Camera, triangulate_poses
 
 if TYPE_CHECKING:
     import numpy as np
@@ -28,7 +28,7 @@ def pack_poses_2d(
 
 __all__ = [
     "Camera",
-    "Triangulator",
     "convert_cameras",
     "pack_poses_2d",
+    "triangulate_poses",
 ]