Add project_ortho() function and tests

tests/test_projection.py

@@ -0,0 +1,14 @@
+from matrixmania.compute import project_ortho
+
+def test_project_ortho_no_scale():
+    point = (1.0, 2.0, 3.0)
+    result = project_ortho(point)
+    expected = (1.0, 2.0)
+    assert result == expected
+
+
+def test_project_ortho_with_scale():
+    point = (1.0, 2.0, 3.0)
+    result = project_ortho(point, scale=100)
+    expected = (100.0, 200.0)
+    assert result == expected