👌 Improve legend placement in plot_data_overview

[s-weigand]

Just some minor improvements on pacing legends for plot_data_overview

Before

Legend hides part of the plot and has redundant information since the legends for LSV and RSV link the same color to the same index.

When users want to plot more vectors things get out of control

After

Also plays nicely if users want to plot more vectors

Checklist

• ✔️ Passing the tests (mandatory for all PR's)

[github-actions]

👈 Launch a binder notebook on branch s-weigand/pyglotaran-extras/improve-dataplot-legend-placement

[codecov]

Codecov Report

Merging #77 (e189612) into main (68fb194) will decrease coverage by 0.12%.
The diff coverage is 0.00%.

@@            Coverage Diff             @@
##             main      #77      +/-   ##
==========================================
- Coverage   40.85%   40.72%   -0.13%     
==========================================
  Files          22       22              
  Lines         629      631       +2     
  Branches       90       91       +1     
==========================================
  Hits          257      257              
- Misses        372      374       +2     

Impacted Files	Coverage Δ
pyglotaran_extras/plotting/plot_data.py	37.50% <0.00%> (-2.50%)	⬇️

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[sourcery-ai]

Sourcery Code Quality Report

❌  Merging this PR will decrease code quality in the affected files by 2.71%.

Quality metrics	Before	After	Change
Complexity	2.81 ⭐	3.74 ⭐	0.93 👎
Method Length	110.50 🙂	120.50 😞	10.00 👎
Working memory	14.67 😞	14.78 😞	0.11 👎
Quality	51.98% 🙂	49.27% 😞	-2.71% 👎

Other metrics	Before	After	Change
Lines	83	81	-2

Changed files	Quality Before	Quality After	Quality Change
pyglotaran_extras/plotting/plot_data.py	51.98% 🙂	49.27% 😞	-2.71% 👎

Here are some functions in these files that still need a tune-up:

File	Function	Complexity	Length	Working Memory	Quality	Recommendation
pyglotaran_extras/plotting/plot_data.py	plot_data_overview	4 ⭐	207 ⛔	16 ⛔	44.92% 😞	Try splitting into smaller methods. Extract out complex expressions

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