* Remove unneeded rule suppression
* Format tests/unit/.eslintrc.json
* build/.eslintrc.json: add strict for consistency

Co-Authored-By: Martijn Cuppens <martijn.cuppens@gmail.com>

* Bump eslint-plugin-unicorn from 18.0.1 to 19.0.1

Bumps [eslint-plugin-unicorn](https://github.com/sindresorhus/eslint-plugin-unicorn) from 18.0.1 to 19.0.1.
- [Release notes](https://github.com/sindresorhus/eslint-plugin-unicorn/releases)
- [Commits](https://github.com/sindresorhus/eslint-plugin-unicorn/compare/v18.0.1...v19.0.1

)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

* ESlint: disable a few new rules for now.

* unicorn/no-fn-reference-in-iterator
* unicorn/no-null

Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>
Co-authored-by: XhmikosR <xhmikosr@gmail.com>

- Rename available vars section to root vars and mention they're globally available
- Add new component vars section and link to table docs for WIP example

- Broke up existing theming page into separate pages
- Audited and updated each new docs page (some pages include some TBD sections)
- Update sidenav to reflect changes
- Fix links that pointed to the old Theming page
- Update docs styles to reflect recent changes
- Rewrite some bits in the Migration page

- Rename `$enable-prefers-reduced-motion-media-query` to `$enable-reduced-motion`
- Rename `$enable-pointer-cursor-for-buttons` to `$enable-button-pointers`

Co-Authored-By: Mark Otto <markd.otto@gmail.com>

Co-authored-by: XhmikosR <xhmikosr@gmail.com>

Reduce the output HTML

Co-authored-by: Martijn Cuppens <martijn.cuppens@gmail.com>

* Disable negative margins by default

* Use shorter enable variable

Co-authored-by: XhmikosR <xhmikosr@gmail.com>

Cleans up some column classes to ensure things line up across all viewports. Also fixes some broken padding on the .navbar-brand.

Co-authored-by: XhmikosR <xhmikosr@gmail.com>

- Convert to Sass map
- Consolidate font-weights into single option (matching line-height for them)
- Add two new sizes and create a new scale
- Update migration docs

Co-authored-by: Martijn Cuppens <martijn.cuppens@gmail.com>

- Updates mentions of number and exact tiers
- Updates grid example to include xxl container
- Adds some scss-docs references
- Cleans up other grid mentions and docs
- Updates navbar example to include an expand at XXL variant