refactor: Consolidate /badges and /credentials routes

[maiertech]

Description of change

• I consolidated the /badges and /credentials routes into the /credenetials route.
  • The route gets a layout that includes the top navigation. This is the prototype for future layout refactorings.
  • I extracted components used on this route. This is WIP, as we will still need to come up with a better way to render individual claim fields.
  • On the new route, colors use semantic color names (see further down).
  • I updated the corresponding translations.
• The root layout now manages safe area insets. The root layout also sets default semantic colors and can turn transparent for the /scan route.
• I replaced .ttf fonts with standard web fonts in .woff2 format.
• I introduced semantic color names and corresponding CSS variables which hold the correct color in light and dark mode. This reduces repetition and duplication to handle dark mode. In a future refactoring, more semantic colors should be introduced and applied to other routes.
• I refactored the dark mode logic. Class dark is now applied to root layout.
• I added @tailwindcss/typography to rendered Markdown prettier.
• I fixed a number of z-index issues by adding additional stacking contexts.
• I fixed the prerender settings for SvelteKit's adapter-static.

Links to any relevant issues

• Fixes Consolidate /badges and /credentialsroutes #284.

How the change has been tested

Describe the tests that you ran to verify your changes.
Make sure to provide instructions for the maintainer as well as any relevant configurations.

Definition of Done checklist

Add an x to the boxes that are relevant to your changes.

• I have followed the contribution guidelines for this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes