# Phase 1

Write code that uses `clap` to parse the command line arguments and create a `DrawerOperation` struct from them. The
`DrawerOperation` struct will contain:

- An `operation_type` (`OperationType`, enum of `Open` or `Close`)
- A `drawer_file` (`Path` for the drawer file to open or close)
- A `key_path` (`Path` to the key we'll use, which is either the value of the `-i` flag or the value of the `$DRAWER_KEY`
  env var)
- A `target_path` (`Path` to the contents we're going to put into or take out of the drawer)
- A `force` (bool for whether or not `-f` was passed)

In order for this to be testable, it needs to be a function that returns a `Result<DrawerOperation, DrawerError>`. The
main function should call that and then do nothing with the result.

Certain things should cause the function to return `Err`:

- Not passing a drawer file
- Passing a subcommand other than `open` or `close`
- Passing any flags but `-f` or `-i`
- Not passing `-i` when the `$DRAWER_KEY` environment variable is undefined