ConScapeR documentation webpage

[bniebuhr]

I think a good next step is to make a documentation website for the package. The easiest is to set this up in the main branch by basically running the first three lines in this tutorial: https://pkgdown.r-lib.org/articles/pkgdown.html

Here, using usethis::use_pkgdown_github_pages() is good because we do not need to update the website manually; instead, it is automatically updated as a Github action everytime the main branch receives a push.