Partially implements https://github.com/coder/internal/issues/893
This isn't the full implementation of `coder exp tasks create` as
defined in the issue, but it is the minimum required to create a task.
Fixescoder/internal#892Fixescoder/internal#896
Example output:
```
❯ coder exp task list
ID NAME STATUS STATE STATE CHANGED MESSAGE
a7a27450-ca16-4553-a6c5-9d6f04808569 task-hardcore-herschel-bd08 running idle 5h22m3s ago Listed root directory contents, working directory reset
50f92138-f463-4f2b-abad-1816264b065f task-musing-dewdney-f058 running idle 6h3m8s ago Completed arithmetic calculation
```
Danielle Maywood