Add WXT to "Projects Using Vite.js"

[aklinker1]

https://wxt.dev/

Please make sure all the requirements are satisfied, otherwise the PR could be closed without further notice.

Checklist

• Title as described.
• Make sure you put things in the right category.
• The description of your item should be a sentence with less than 24 words.
• Avoid using links and parentheses in description.
• Omit unnecessary words already provided in the context (e.g. for Vite, a Vite plugin).
• Use proper case for terms (e.g. GitHub, TypeScript, ESLint, etc.)
• When mentioning tools, omit versions whenever possible (e.g. use TypeScript instead of TypeScript 4.x, but keep Vue 2 and Vue 3 as they're incompatible).
• When mentioning package names, use quotes whenever possible.
• Always add your items to the end of a list.