Add plate boundaries as a built-in dataset

**Description of the desired feature**

Since it's one of the most frequently used geo datasets to plot as well as based on a comment in the forum (https://forum.generic-mapping-tools.org/t/borders-plate-tectonics/1946) I think it would be useful to have the plate boundaries of [Bird (2002)](https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2001GC000252) as a built-in dataset in GMT/PyGMT.

**Are you willing to help implement and maintain this feature?** Yes (but first discuss)