Instead of needing to run the commands manually in main.go, we can implement the `Run(...) error` method to satisfy the command interface so that `kong` can Run our commands for us.
This commit uses the embedded style struct for styling in all components. The most notable example is `gum write` where there are many styles that are used and composed for each component of the command.
Write provides a shell script interface for the text area bubble. It can
be used to ask the user to write some long form of text (multi-line)
input. The text the user entered will be sent to stdout.
```
gum write > output.text
```
