Add support for text(s)

[sgraaf]

Add support for rendering text(s).

PaperMap uses fpdf2 for the generating of the paper map PDF document in general, and its .cell() method to add the attribution, scale and coordinate grid labels.

[sgraaf]

Here's the implementation for rendering the attribution and scale at the moment:

papermap/src/papermap/papermap.py

Lines 311 to 317 in 1c4288e

	def render_attribution_and_scale(self) -> None:
	text = f"{self.tile_server.attribution}. Created with {NAME}. Scale: 1:{self.scale}"
	self.pdf.set_xy(
	self.margin_left + self.pdf.epw - self.pdf.get_string_width(text),
	self.margin_top + self.pdf.eph - pt_to_mm(self.pdf.font_size_pt),
	)
	self.pdf.cell(w=0, txt=text, align="R", fill=True)