web: add redesign root color palette as CSS variables
Created by: valerybugakov
Changes
- Added CSS variables for our root color palette.
- Removed redundant SCSS variables.
- Added
variables-redesign.scss
file which contains overwrites for Bootstrap core colors. The@if
statement should be removed from this file once the redesign is ready for release. Added this step to the pre-release checklist.
Closes https://github.com/sourcegraph/sourcegraph/issues/20665.