Addes Javascript & Programming Fundamentals Books (#3695)

* Addes Javascript & Programming Fundamentals Books

Added Bengali language Javascript and Programming Fundamentals Books

* remove trailing slash on hostname per style guidelines

* alphabetical order
Co-authored-by: NEric Hellman <eric@hellman.net>

free-programming-books-bl.md

 ### Index
 
 * [C](#c)
+* [JavaScript](#JavaScript)
 * [Machine Learning](#machine-learning)
+* [PROGRAMMING FUNDAMENTALS](#programming-fundamentals)
 * [Python](#python)
 
 
@@ -10,12 +12,24 @@
 * [Computer Programming](http://cpbook.subeen.com/p/blog-page.html) - Tamim Shahriar Subeen 
 
 
+### JavaScript
+
+* [হাতেকলমে জাভাস্ক্রিপ্ট](https://zonayed.js.org) - Zonayed Ahmed
+
+
 ### Machine Learning
 
 * [শূন্য থেকে পাইথন মেশিন লার্নিং : হাতেকলমে সাইকিট-লার্ন](https://raqueeb.gitbook.io/scikit-learn/) - Rakibul Hassan
 * [হাতে কলমে মেশিন লার্নিং ১](https://rakibul-hassan.gitbook.io/mlbook-titanic/) - Rakibul Hassan
 
 
+### PROGRAMMING FUNDAMENTALS
+
+* [SL3 Framework - Code For Brain](https://sl3.app) - Stack Learners
+
+
 ### Python
 
 * [সহজ ভাষায় পাইথন ৩](https://python.maateen.me) - Maksudur Rahman Maateen
+
+