SASS Dev cleanup

[DawoudIO]

Description & Issue number it closes

• move to grunt-contrib-sass
• Update imports - https://sass-lang.com/documentation/breaking-changes/import/

Screenshots (if appropriate)

To address the following

Running "sass:dist" (sass) task
Deprecation Warning: The legacy JS API is deprecated and will be removed in Dart Sass 2.0.0.

More info: https://sass-lang.com/d/legacy-js-api

Deprecation Warning: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.

More info and automated migrator: https://sass-lang.com/d/import

   ╷
29 │ @import 'scss/dropdowns';
   │         ^^^^^^^^^^^^^^^^
   ╵
    src/skin/churchcrm.scss 29:9  root stylesheet

Deprecation Warning: Sass @import rules are deprecated and will be removed in Dart Sass 3.0.0.

More info and automated migrator: https://sass-lang.com/d/import

   ╷
30 │ @import 'scss/forms';
   │         ^^^^^^^^^^^^
   ╵
    src/skin/churchcrm.scss 30:9  root stylesheet

How to test the changes?

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

How Has This Been Tested?

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• Any dependent changes have been merged and published in downstream modules