Pass simulation data via CSV file to explorer

[davidanthoff]

This might work better with large simulation data than the current approach. I only implemented it for one specific plot type. If this works we might also use this approach for other figures.

Also updated vega and vega-lite to their latest versions.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 84.84%. Comparing base (9da9ce9) to head (f437479).

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #1018   +/-   ##
=======================================
  Coverage   84.84%   84.84%           
=======================================
  Files          40       40           
  Lines        4070     4072    +2     
=======================================
+ Hits         3453     3455    +2     
  Misses        617      617           

Flag	Coverage Δ
unittests	84.84% <100.00%> (+<0.01%)	⬆️

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

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

---

🚨 Try these New Features:

• Flaky Tests Detection - Detect and resolve failed and flaky tests
• JS Bundle Analysis - Avoid shipping oversized bundles

[lrennels]

@davidanthoff from a code perspective this looks good to me, and all tests are passing. I also ran the test_explorer_sim.jl test file locally and looked at outputs to make sure things looked ok and they do as far as I can tell.

In terms of improvement to performance we should test with a model that has a fine grained spatial dimension, like countries (GIVE) or even coastal segments (CIAM). I think @corakingdon has an example case, but I can give it a try too.