Whole game feedback from O'Reilly (#1057)

* Redraw data science process diagrams

* Polishing the whole game

* Add reference to TMWR

* Respond to visualization feedback

* Minor changes

* Better integrate workflow-scripts chapter

* Minor getting help polishing

* Update investing in yourself links

* Redraw RStudio screenshots

* More scripts/projects polishing

Co-authored-by: Mine Cetinkaya-Rundel <cetinkaya.mine@gmail.com>

diagrams/rstudio-screenshots/diagnostics.R

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+x y <- 10
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+
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+3 == NA
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diagrams/rstudio-screenshots/rstudio-screenshots.Rproj

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