feat(KUI-1262): upgrade to KTH Style 10

[ghost]

Main goal of this PR is to upgrade KTH Style to version 10.

A short summary of what have been done:

• Upgrading KTH packages and adding new @kth/style along side with old kth-style (the old will be deprecated)
• General cleanup of DOM structure to algin with other Om kursen apps.
  • More cleanup in side-panel. Take an extra look at RoundInformationOneCol.jsx
• New header and footer
• New of style of all Buttons, Alerts and SideMenu
• Added "prose" style to articles/text sections
• General cleanup of style including font-family, colors and more.
• Move of toolbar url (Personliga menyn) to parameters file to support ref version in ref/loaclhost

Some code are duplicated a cross different Om kursen repos. Such SCSS has been moved to shared.scss and components to /shared-components. PRs for other Om kursen apps that are upgraded at the same time with same structure:

• Kopps public: feat(KP-317): upgrade to KTH Style 10 kopps-public-react-web#242
• Kurs PM: feat(KUI-1261): upgrade to KTH Style 10 kurs-pm-web#373
• Kursutveckling: feat(KUI-1260): upgrade to KTH Style 10 kursutveckling-web#274

[belanglos]

LGTM, only found one unused prop.