separating the helper methods

[jwoertink]

Purpose

fixes #791

Description

Now that we have a distinction between helper methods that return String VS ones that actually return Nil because they write to the view directly, we can separate these methods out in to their own modules. This will make it easier for people to decipher which ones do what. As well as documentation.

Checklist

• - An issue already exists detailing the issue/or feature request that this PR fixes
• - All specs are formatted with crystal tool format spec src
• - Inline documentation has been added and/or updated
• - Lucky builds on docker with ./script/setup
• - All builds and specs pass on docker with ./script/test

[paulcsmith]

Just one thought. Up to you though! LGTM when you’re ready