Signed-off-by: Takuya Noguchi <takninnovationresearch@gmail.com>

Added stylelint to static-analysis
Updated yarn dependencies
CSS Fixes and rule adoptions of stylelint
Added stylelint-scss
Deduplicated yarn.lock to clear dependencies

First round of advanced stylelint rules

Mainly Vendor prefix updates related to flex

Updates to more webkit specific vendor prefixes

Finished all vendor specific fixes

Moved now 4 rules to warning

Fixed the new scss lint problems

More stylelint adaptions after rebase

This commit closes #51807 issue.

- Improves spacing between account buttons on Profile
- AccountsController#show uses locals instead of instance variables
- New `display_providers_on_profile?` helper method
- Adds `render_if_exists` for GroupSAMl unlink buttons

See: https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/8682

be used with the email profile page as well

Closes #30338