set up repo

[juliasloan25]

Set up initial state/infrastructure of the repo

Closed by #3
Tracked by #39

To Do

• update README.md Update README.md #1
• set up folder structure (.dev, .github, docs, experiments, src, test)
• add project.tomls for all directories except src/
• set up top level project
• copy .dev, .github contents from another CliMA repo
  • include github actions, juliaformatter, compathelper