BEM-Refactoring

[deleonio]

Dokumentation ist hier zu finden: https://getbem.com/

Folgende Komponenten müssen umgeändert und die Themes angepasst werden:

https://github.com/public-ui/kolibri/pull/7063

• [x] Abbr
• [x] Accordion
• [x] Alert
• [x] Avatar (Gute Komponente für den Start)
• [x] Badge
• [x] Breadcrumb

https://github.com/public-ui/kolibri/pull/7083

• [ ] ButtonLink
• [x] Button
• [x] ButtonGroup (entfällt)

https://github.com/public-ui/kolibri/pull/7117

• [x] Quote
• [ ] Pagination

PRs folgen:

• [ ] Card
• [ ] Combobox
• [ ] Details
• [ ] Dialog
• [ ] Drawer
• [ ] Form
• [ ] Heading
• [ ] Icon
• [ ] Image
• [ ] IndentedText
• [ ] InputCheckbox
• [ ] InputColor
• [ ] InputDate
• [ ] InputEmail
• [ ] InputFile
• [ ] InputNumber
• [ ] InputPassword
• [ ] InputRadio
• [ ] InputRange
• [ ] InputText
• [ ] KoliBri
• [ ] LinkButton
• [ ] LinkGroup
• [ ] Link
• [ ] Modal
• [ ] Nav
• [ ] Popover
• [ ] Progress
• [ ] Select
• [ ] SingleSelect
• [ ] SkipNav
• [ ] Span
• [ ] Spin
• [ ] Split-Button
• [ ] TableStateful
• [ ] TableStateless
• [ ] Tabs
• [ ] Textarea
• [ ] Toaster
• [ ] Toolbar
• [ ] Tooltip
• [ ] Tree Item
• [ ] Tree
• [ ] Version