[py] Add wpimath/kinematics tests (#8461)

Used Gemini to convert the C++ tests in wpimath/.../kinematics to
pytest. For ease of use required a better constructor for
`MecanumDriveWheelPositions`

I did this conversion months ago (before robotpy landed and before the
reorg), so new tests might be missing. At least its better than nothing
🤷

Broke the huge pr that does almost everything into parts so its easier
to review.

---------

Co-authored-by: David Vo <auscompgeek@users.noreply.github.com>

wpimath/src/test/python/kinematics/test_differential_drive_odometry.py

@@ -0,0 +1,18 @@
+import pytest
+import math
+
+from wpimath import DifferentialDriveOdometry, Rotation2d
+
+
+def test_encoder_distances():
+    odometry = DifferentialDriveOdometry(
+        gyroAngle=Rotation2d.fromDegrees(45), leftDistance=0, rightDistance=0
+    )
+
+    pose = odometry.update(
+        gyroAngle=Rotation2d.fromDegrees(135), rightDistance=0, leftDistance=5 * math.pi
+    )
+
+    assert pose.x == pytest.approx(5.0, abs=1e-9)
+    assert pose.y == pytest.approx(5.0, abs=1e-9)
+    assert pose.rotation().degrees() == pytest.approx(90.0, abs=1e-9)