CSS Library - Refactor app by app imports

[micahchiang]

Description

Many applications in vets-website import the same handful of sass modules directly into their application structure:

@import "~@department-of-veterans-affairs/formation/sass/shared-variables";
@import "~@department-of-veterans-affairs/formation/sass/modules/m-process-list";
@import "~@department-of-veterans-affairs/formation/sass/modules/m-form-process";
@import "../../../platform/forms/sass/m-schemaform";
@import "~@department-of-veterans-affairs/formation/sass/modules/m-modal";
@import "~@department-of-veterans-affairs/formation/sass/modules/m-omb-info";
@import "../../../platform/forms/sass/m-form-confirmation";

Note: by the time we prioritize this ticket, the import paths above will likely point to css-library

We need to spend some time determining whether or not all of these can be refactored and rely on the platform provided imports instead.

Tasks

• Pick an app in vets-website and attempt to remove the sass imports, see what breaks, determine if there's a good way for that app to inherit from platform so we can reduce the amount of redundancy in vets-website
• Compile findings into a doc or comment on this ticket that will help us determine whether or not we can move forward with a broader refactor