Docs page for vignettes or scenarios

Would be cool to have snippets page that covers some very common tasks. Here are a few off the top of my head:

- [ ] recursively get all files in a directory (i.e., with `glob`)
- [ ] list directory, but not recursively
- [ ] write a new file to the cloud
- [ ] make a persistent local cache
- [ ] open a file for read/write
- [ ] passing an instantiated client rather than using the default