Forge 6.7 design updates

[DFurnes]

• [x] New typographic scale, line height, and paragraph/container padding changes.
• [x] Update build system to use Webpack for SCSS.
• [x] Remove data URI strings and use Webpack to generate on-demand with url-loader.
• [x] New “tinted” modifier for figures
• [x] Decreased padding in “trio” gallery
• [x] Updated banner pattern.
• [x] New “bragging figure” pattern.