feature: add Remix courses to free-courses-en.md (#12303)

* feature: add five Remix courses to free-courses-en.md

* fix: removed courses that don't fit the repo guidelines

* fix: shortened Yt links in free-courses-en.md

* Update courses/free-courses-en.md

Co-authored-by: Eric Hellman <eric@hellman.net>

---------

Co-authored-by: Eric Hellman <eric@hellman.net>

courses/free-courses-en.md

@@ -65,6 +65,7 @@
     * [React](#react)
     * [React Native](#react-native)
     * [Redux](#redux)
+    * [Remix](#remix)
     * [Svelte](#svelte)
     * [Three.js](#threejs)
     * [TypeScript](#typescript)
@@ -1200,6 +1201,12 @@
 * [Redux Tutorial- Learn Redux from Scratch](https://www.youtube.com/watch?v=poQXNp9ItL4) - Mosh Hamedani
 
 
+#### Remix
+
+* [Remix and Strapi Crash Course – Full Stack Development](https://www.youtube.com/watch?v=5yIivwrvH6w) - freeCodeCamp.org
+* [Remix Tutorial with Kent](https://www.youtube.com/live/hsIWJpuxNj0) - Remix
+
+
 #### Svelte
 
 * [Beginner SvelteKit](https://www.youtube.com/playlist?list=PLtgYhHmUIr3qDB2eTzY-nuBH1W5tOK8a4) - Steph Dietz