feature: add new free courses in JavaScript (Astro, Electron, React) (#12302)

* feature: add new free courses in JavaScript (Astro, Electron, React) * Update courses/free-courses-en.md Co-authored-by: Eric Hellman <eric@hellman.net> * fix: shortened links in free-courses-en.md --------- Co-authored-by: Eric Hellman <eric@hellman.net>

Author: HRIDYANSHU054

courses/free-courses-en.md

@@ -1060,6 +1060,7 @@
 
 ### Astro
 
+* [Astro](https://www.youtube.com/playlist?list=PLMZnTut8a7icI97DDc2izk6nOoNlHyXgw) - Stefan Rows
 * [Astro Blog Course](https://www.youtube.com/playlist?list=PLoqZcxvpWzzeRwF8TEpXHtO7KYY6cNJeF) - Coding in Public
 * [Astro Crash Course](https://www.youtube.com/watch?v=Oi9z5gfIHJs) - Traversy Media
 * [Astro Web Framework Crash Course](https://www.youtube.com/watch?v=e-hTm5VmofI) - freeCodeCamp
@@ -1081,6 +1082,7 @@
 #### Electron
 
 * [Electron Complete Course](https://www.youtube.com/playlist?list=PLmx8ERLT7ojO2PAH_sDnnoKXcqswxJ6CL) - coderJeet
+* [Electron Course - Code Desktop Applications (inc. React and Typescript)](https://www.youtube.com/watch?v=fP-371MN0Ck) - freeCodeCamp.org
 * [Electron js Tutorials](https://www.youtube.com/playlist?list=PLC3y8-rFHvwiCJD3WrAFUrIMkGVDE0uqW) - Codevolution
 
 
@@ -1164,6 +1166,7 @@
 * [React State Management Intermediate JavaScript Course](https://www.youtube.com/watch?v=-bEzt5ISACA) - Jack Herrington (freeCodeCamp)
 * [React State Management using Context API (useContext + useReducer Hooks = Magic)](https://www.youtube.com/watch?v=zxP4oGejqpU) - The Full Stack Junkie
 * [React Testing Library Crash Course](https://www.youtube.com/playlist?list=PL4cUxeGkcC9gm4_-5UsNmLqMosM-dzuvQ) - The Net Ninja
+* [React Tutorial Full Course - Beginner to Pro (React 19, 2025)](https://www.youtube.com/watch?v=TtPXvEcE11E) - SuperSimpleDev
 * [React Tutorials](https://www.youtube.com/playlist?list=PLWKjhJtqVAbkArDMazoARtNz1aMwNWmvC) - freeCodeCamp
 * [ReactJS - Tutorial for Beginners](https://www.youtube.com/watch?v=Ke90Tje7VS0) - Mosh Hamedani (Programming with Mosh)
 * [ReactJS Basics](https://www.youtube.com/playlist?list=PLe30vg_FG4OSw8SIcLVci-jB_-W1ZkLYp) - Bitfumes