Add real-world scenarios to help beginners understand rm() function

[chenziru]

How could the content be improved?

When first learning R, audiences might find it difficult to understand the use cases of the rm() function, making it hard to form an intuitive understanding and remember this concept. Adding a description of practical scenarios might be helpful, such as:

Situations for cleaning up your work environment:

• When you have too many unnecessary objects in memory
• When you need to free up memory space
• When you've completed a phase of work and need to clean up intermediate variables

Which part of the content does your suggestion apply to?

https://swcarpentry.github.io/r-novice-gapminder/01-rstudio-intro.html