Configure and initialize sass compilation of web-assets-v2 component forms
branch to be used in survey templates until the main website is not yet
migrated to bwa v2. It decouples surveys' styling from the main website
temporarily, to start form building with latest web-assets v2 forms defaults.
Initialize git submodule assets_shared_v2_component_forms temporarily to be
used with survey templates until the project is not yet fully migrated to
web-assets v2.