Spin provides a shell script interface for the spinner bubble. It is
useful for displaying that some task is running in the background while
consuming it's output so that it is not shown to the user.
For example, let's do a long running task:
```
sleep 5
```
We can simply prepend a spinner to this task to show it to the user,
while performing the task / command in the background.
```
gum spin -t "Taking a nap..." -- sleep 5
```
The spinner will automatically exit when the task is complete.
Search provides a fuzzy searching text input to allow filtering a list
of options to select one option.
i.e. Let's pick from a list of gum flavors:
```
cat flavors.text | gum search
```
Input provides a shell script interface for the text input bubble. It
can be used to prompt the user for some input. The text the user entered
will be sent to `stdout`.
```
gum input --placeholder "What's your Bubble Gum flavor?" > answer.text
````
