All of my changes so far!

[kristinawlai]

I guess I didn't know how to create a pull request before now! This includes my edits to the readme, changing all package names to "serocalculator", and beginning updates to the new typhoid vignette.

[d-morrison]

Nice work setting up this PR! Let's try two more steps:

1. add me as a reviewer for this PR (see the Reviewers pane near the top right)
2. merge the "main" branch from UCD-SERG into the "main" branch on your fork. If you go to https://github.com/kristinawlai/serocalculator/, you should see a message:

"This branch is [4 commits ahead] [5 commits behind] UCD-SERG:main."

Clicking on the [5 commits behind] part should set up the merge for you; if you get stuck, let me know!

Thanks,
Ezra

[d-morrison]

PS - the reason for 2 is to try to resolve the check errors above; if that doesn't do the trick, we should take a closer look at those errors and try to resolve them.

[d-morrison]

PPS - I made some conflicting changes to the readme, so I added a commit resolving those conflicts. We still have to resolve the check errors though.