Rewrite dm.viz.circle_grid with RDKit's canvas and support grid image for lasso highlight

[maclandrol]

Changelogs

• Add supports for molecular grid in lasso highlight, fixing #199
• Rewrite circle grid with the RDKit canvas system and remove image stacking, fixing #196
• Allow more functionalities in dm.circle_grid (better management of molecule size, more drawing options exposed to the user, support of some of the key features of to_image including align and atom/bond highlight

• Minor refactoring of the viz module, with a new image_to_file function

Checklist:

• [x] Was this PR discussed in an issue? It is recommended to first discuss a new feature into a GitHub issue before opening a PR.
• [x] Add tests to cover the fixed bug(s) or the new introduced feature(s) (if appropriate).
• [x] Update the API documentation is a new function is added, or an existing one is deleted.
• [x] Write concise and explanatory changelogs below.
• [x] If possible, assign one of the following labels to the PR: feature, fix or test (or ask a maintainer to do it for you).

---

This PR fixes #196 and #199

[maclandrol]

You can now do this efficiently:

[codecov[bot]]

Codecov Report

Merging #203 (16af43f) into main (9bea940) will increase coverage by 0.52%. The diff coverage is 92.19%.

@@            Coverage Diff             @@
##             main     #203      +/-   ##
==========================================
+ Coverage   91.48%   92.01%   +0.52%     
==========================================
  Files          46       46              
  Lines        3664     3781     +117     
==========================================
+ Hits         3352     3479     +127     
+ Misses        312      302      -10     

Flag	Coverage Δ
unittests	92.01% <92.19%> (+0.52%)	:arrow_up:

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

Impacted Files	Coverage Δ
datamol/convert.py	88.77% <ø> (-0.06%)	:arrow_down:
datamol/viz/utils.py	88.23% <83.33%> (+3.61%)	:arrow_up:
datamol/viz/_lasso_highlight.py	91.51% <91.74%> (+0.56%)	:arrow_up:
datamol/viz/_circle_grid.py	92.81% <92.75%> (+14.10%)	:arrow_up:
datamol/types.py	100.00% <100.00%> (ø)
datamol/viz/_viz.py	90.74% <100.00%> (+2.80%)	:arrow_up:

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