Add region handling of boundary points from arc

[Argmaster]

Inspired by @jekoie issue #222 from pcb-tools repository

Below gerber file, why pcb-tools draw it in a wrong way?

G04 This file illustrates how to use levels to create holes*
%FSLAX25Y25*%
%MOMM*%
G01*
G04 First level: big square - dark polarity*
%LPD*%
G36*
X250000Y250000D02*
X1750000D01*
Y1750000D01*
X250000D01*
Y250000D01*
G37*
G04 Second level: big circle - clear polarity*
%LPC*%
G36*
G75*
X500000Y1000000D02*
G03*
X500000Y1000000I500000J0D01*
G37*
G04 Third level: small square - dark polarity*
%LPD*%
G36*
X750000Y750000D02*
X1250000D01*
Y1250000D01*
X750000D01*
Y750000D01*
G37*
G04 Fourth level: small circle - clear polarity*
%LPC*%
G36*
G75*
X1150000Y1000000D02*
G03*
X1150000Y1000000I250000J0D01*
G37*
M02*

It should be this:

pcb-tools draw this:

Above code mostly works, but required additional G01 in before rectangle region creation:

G04 Third level: small square - dark polarity*
G01*

Additionally, during development of this feature I might have revealed hidden issue with centering images with debug features enabled, further investigation is needed.

[codecov]

Codecov Report

Merging #61 (edffdf0) into dev (d5c3f25) will increase coverage by 0.05%.
The diff coverage is 97.95%.

@@            Coverage Diff             @@
##              dev      #61      +/-   ##
==========================================
+ Coverage   89.94%   89.99%   +0.05%     
==========================================
  Files          96       96              
  Lines        2853     2878      +25     
==========================================
+ Hits         2566     2590      +24     
- Misses        287      288       +1     

Flag	Coverage Δ
unittests	89.99% <97.95%> (+0.05%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files Changed	Coverage Δ
src/pygerber/gerberx3/tokenizer/tokens/d01_draw.py	96.82% <96.15%> (-1.29%)	⬇️
...ygerber/backend/abstract/draw_commands/draw_arc.py	98.50% <100.00%> (+0.72%)	⬆️
...er/backend/rasterized_2d/draw_commands/draw_arc.py	88.88% <100.00%> (-3.12%)	⬇️

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