Prompt Chrome users to pin icon on installation?

In Chrome, the page action icon is buried in the "Extensions" menu instead of displaying first class. The only way to change this is to have the user "pin" the icon. 

StackOverflow question: https://stackoverflow.com/questions/64072889/

**TODO:**
- [ ] Check to see if such a prompt is against Chrome Extension TOS
- [ ] If it isn't, implement a prompt to pin the extension