Add cheatsheet and more videos to README (#837) #1100

Job	Run time
SuperLinter 🦸‍♀️	0s
Check URLs 🌐	0s
Grammar Check 🔤	0s
Style Check 👗	0s
Audit Dependencies 🕵️‍♂️ / oysteR scan 🦪	1m 44s
R CMD Check 🧬 / ghcr.io/insightsengineering/rstudio, version latest	8m 41s
Coverage 📔 / Coverage 📔	6m 23s
Coverage 📔 / Covtracer 🐄	0s
gitleaks 💧 / gitleaks 💧	7s
gitleaks 💧 / PII Check 💳	0s
Roxygen 🅾 / Manual pages check 🏁	1m 53s
Spell Check 🆎 / Check spelling 🔠	1m 41s
Version Bump 🤜🤛 / Bump version ⤴	59s
License Check 🃏 / Check 🚩	40s
Version Check 🏁 / Emoji in NEWS.md 📰	8s
Version Check 🏁 / Version check 🏁	5s
Coverage 📔 / Publish coverage report 📰	9s
R CMD Check 🧬 / Upload build tar.gz	0s
R CMD Check 🧬 / Publish JUnit HTML report 📰	10s
	22m 40s

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