Update instructions on how to default to `{styler}` for formatting

[IndrajeetPatil]

The latest version of RStudio (2024.12.0 Build 467) makes it easy to do so globally:

[lorenzwalthert]

There is a vignette on thirty-party integrations. We could add it there at the top. Also, we can coordinate a post on LinkedIn / X. Have you tried out the feature? Last time I tried, it did not work perfectly in rstudio/rstudio#2563 (comment).

[lorenzwalthert]

FWIW, I posed on LinkedIn @IndrajeetPatil.