Use keyWords args in Ellipse

[carlosal1015]

I wonder why with Python 3.13 I have the error when run the example.
I took this example.

do not works fine

import numpy as np
from matplotlib.patches import Ellipse

delta = 45.0
angles = np.arange(0, 360 + delta, delta)
ells = [Ellipse((1, 1), 4, 2, a) for a in angles]

works fine

import numpy as np
from matplotlib.patches import Ellipse

delta = 45.0
angles = np.arange(0, 360 + delta, delta)
ells = [Ellipse(xy=(1, 1), width=4, height=2, angle=b) for b in angles]

Traceback (most recent call last):
  File "/tmp/main.py", line 6, in <module>
    ells = [Ellipse((1, 1), 4, 2, a) for a in angles]
            ~~~~~~~^^^^^^^^^^^^^^^^^
TypeError: Ellipse.__init__() takes 4 positional arguments but 5 were given

In this PR, I am adding keywords args to Ellipse class.