Add Smithy Formatter To Gradle Tasks

[0xjjoyy]

When contributing it's easier if there is a gradle task that can take care of formatting the Smithy files according to the project's desired format, such as empty line at EOF.

Doing a clean checkout and running the gradle tasks doesn't show any Smithy file formatter

./gradlew tasks

Please add the Smithy File formatter plugin to this project so it'll be easier and faster to make pull requests and contributions.

[JordonPhillips]

The gradle plugin already runs a formatter automatically.... or it's supposed to. Specifically the task is smithyFormat. It doesn't seem to be doing much though....

[JordonPhillips]

Ah it seems we just have it disabled on a number of projects