website: Add API documentation

Change-Id: Iea4fa8d281c58c4c27cf342a5bc87d7ec39d4116
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5-website/+/34897
Reviewed-by: Jason Lowe-Power <power.jg@gmail.com>
Maintainer: Jason Lowe-Power <power.jg@gmail.com>
Tested-by: Jason Lowe-Power <power.jg@gmail.com>
2 files changed