[Bug] DejaVuSans.ttf default font for grass.jupyter not found on Windows

[echoix]

Describe the bug

When enabling Pytest tests on Windows, I had to disable a test named "test_save", as the save() function in grass.jupyter.timeseriesmap has a default value for font, and it isn't found on Windows.

The current solution I had is to just let Pillow use its default value for the font if none is passed. I don't know know how to see the result with it.

    def save(
        self,
        filename,
        duration=500,
        label=True,
-       font="DejaVuSans.ttf",
+       font=None,
        text_size=12,
        text_color="gray",
    ):

And adding

        if font is None and not sys.platform.startswith("win"):
            font = "DejaVuSans.ttf"

The code in question is

grass/python/grass/jupyter/timeseriesmap.py

Lines 316 to 360 in 04cc9ea

	def save(
	self,
	filename,
	duration=500,
	label=True,
	font="DejaVuSans.ttf",
	text_size=12,
	text_color="gray",
	):
	"""
	Creates a GIF animation of rendered layers.
	Text color must be in a format accepted by PIL ImageColor module. For supported
	formats, visit:
	https://pillow.readthedocs.io/en/stable/reference/ImageColor.html#color-names
	param str filename: name of output GIF file
	param int duration: time to display each frame; milliseconds
	param bool label: include date/time stamp on each frame
	param str font: font file
	param int text_size: size of date/time text
	param str text_color: color to use for the text.
	"""
	# Render images if they have not been already
	if not self._layers_rendered:
	self.render()
	input_files = []
	for date in self._labels:
	input_files.append(self._base_filename_dict[date])
	save_gif(
	input_files,
	filename,
	duration=duration,
	label=label,
	labels=self._labels,
	font=font,
	text_size=text_size,
	text_color=text_color,
	)
	# Display the GIF
	return filename

I'd like some help to know how to address it.

To reproduce

1. Go to a OSGeo4w job log, in the pytest section.
2. In the xfail verbose logs, look at test_save.
3. See error. Between https://github.com/OSGeo/grass/actions/runs/10992700384/job/30517619655#step:12:978 and https://github.com/OSGeo/grass/actions/runs/10992700384/job/30517619655#step:12:1065

Expected behavior

Screenshots

System description

Additional context