* feat(browser): implement theming for notification bar
* refactor(browser): split notification bar function
* refactor(browser): use own method for getCurrentTheme
* chore(browser): add close.svg file as an asset
this file is embedded in apps/browser/src/notification/bar.html
* feat(browser): change textContrast color on primary buttons
* feat(browser): use dedicated color variable for close button
* feat(browser): use textColor for close button
* feat(browser): implement styling for select fields
* feat(browser): improve close button styling, add hover effect
