docs: Add 3 new projects to Resources page

packages/docs/src/pages/resources.mdx

@@ -12,6 +12,7 @@ Tools, themes, extensions and examples built by the Theme UI community.
   Used in Tabetalt’s e-commerce platform.
 - [**@hackclub/theme**](https://theme.hackclub.com):
   Used on [Hack Club’s](https://hackclub.com/) websites.
+  - [Forked](https://github.com/the-innovation-circuit/theme) by [the Innovation Circuit](https://innovationcircuit.com).
 - [**@carbonplan/theme**](https://github.com/carbonplan/theme):
   Used on [Carbonplan’s](https://carbonplan.org) websites.
 - [**@undataforum/preset**](https://github.com/UNDataForum/design-system/tree/master/packages/preset):
@@ -57,6 +58,8 @@ Tools, themes, extensions and examples built by the Theme UI community.
   Next.js blog starter for building blogs with MDX, Theme UI, & Vercel.
 - [**@mattjennings/nextjs-starter**](https://github.com/mattjennings/nextjs-starter):
   Next.js project using Theme UI & Framer Motion.
+- [**Next.js Frontend Starter Pack**](https://github.com/freddydumont/theme-ui-next-boilerplate):
+  Next.js site template using TypeScript, Jest, & Theme UI.
 - [**@hew/gatsby-theme-ui-starter**](https://github.com/hew/gatsby-theme-ui-starter):
   Gatsby.js project using Netlify Forms.
 - [**@codebushi/gatsby-theme-document**](https://github.com/codebushi/gatsby-theme-document):
@@ -80,4 +83,5 @@ Tools, themes, extensions and examples built by the Theme UI community.
   Grab-and-go layouts for React, including Theme UI.
 - [**Next Theme UI**](https://github.com/cobraz/next-theme-ui):
   Components for using Theme UI with Next.js.
-
+- [**MDXP**](https://0phoff.github.io/MDXP):
+  MDX-based presentation deck library using the System UI Theme Specification for theming.