Fix: figure 1 script

[SamuelBrand1]

This PR fixes the script for creating figure 1 so that it runs with the current inference data structure.

Also, I noted that it was possible for the colours used to be inconsistent; I've refactored the figure generating function to be fully Makie based rather than using the AlgebraOfGraphics frontend package to Makie. The downside (if in fact it is a downside) is that the figureone function is imperative rather than declarative.

[github-actions]

Try this Pull Request!

Open Julia and type:

import Pkg
Pkg.activate(temp=true)
Pkg.add(url="https://github.com/CDCgov/Rt-without-renewal", rev="fix-fig1", subdir="EpiAware")
using EpiAware

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 90.96%. Comparing base (ab73d9e) to head (e7c981f).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #555   +/-   ##
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  Coverage   90.96%   90.96%           
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  Files          60       60           
  Lines         863      863           
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  Hits          785      785           
  Misses         78       78           

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[seabbs]

Bit of a shame to move away for AoG but looks good.