Feature: more vue components, dynamic Light and Dark theme variants

[stephiescastle]

Checklist

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Description

Closes https://github.com/nasa-jpl/www/issues/19

This is a follow-up PR to #433 and addresses some needs in https://github.com/nasa-jpl/www/issues/26:

• Theme colors and light/dark variants are now managed entirely in the TailwindCSS config (default, edu and internal themes)
• Adds ability to switch themes and theme variants in Storybook
• Replaces theme-color color in TailwindCSS config with action and emphasis rules (these labels are somewhat arbitrary and can change) and sets appropriate values for the three themes
• removes Tailwindcss Themer, as we ended up not needing it
• Modifies some theme colors to work with interchangable light, dark, and darker naming conventions. These colors will be updated to match the spec once finalized.
• Adds more base blocks and a couple of streamfield blocks to the Vue library

Instructions to test

1. pnpm i
2. make vue-storybook
3. View the BlockQuote stories: http://localhost:6006/?path=/docs/components-blocks-blockquote--docs
4. Change the Theme and Variant options in the tool. Try different combinations.
5. Browse to look at other stories to see similar effects (BlockQuote is the only one that uses EDU's "emphasis" color).

Tested in the following environments/browsers:

Operating System

• macOS
• iOS
• iPadOS
• Windows

Browser

• Chrome
• Firefox ESR
• Firefox
• Safari
• Edge