[FEATURE] Add R plot about Refseq timings

[smehringer]

The script how I created the plot

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Name	Status	Preview	Comments	Updated
raptor	✅ Ready (Inspect)	Visit Preview	💬 Add your feedback	Mar 16, 2023 at 0:29AM (UTC)

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Codecov Report

Patch and project coverage have no change.

Comparison is base (c252c32) 100.00% compared to head (6adc374) 100.00%.

Additional details and impacted files

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