docs: add v1.4.0 release notes and document GitHub Pages website

Author: Tanu-N-Prabhu

Release Notes/v1.4.0.md

@@ -30,8 +30,7 @@
   - Clearly defined the purpose and boundaries of the Python section  
   - Documented folder structure, learning order, and topic coverage  
   - Improved onboarding and navigation for learners focusing on Python fundamentals  
-  - Reinforced separation between Python language concepts and Data Science content
-
+  - Reinforced separation between Python language concepts and Data Science content  
 
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@@ -45,5 +44,15 @@
 
 ---
 
+### Documentation & Website
+* Created and launched a dedicated **GitHub Pages website** for the repository
+* Designed a clean, minimal, and visually consistent interface aligned with the repository structure
+* Added intuitive navigation between **Home**, **Releases**, and **Content** pages
+* Implemented section-based content discovery with styled CTAs linking directly to corresponding GitHub folders
+* Hosted and maintained the website directly from the repository for seamless updates
+
+---
+
 ### Other Changes
-* Prepared groundwork for upcoming phases, starting with **Phase 2: Data Structures**
+* Prepared groundwork for upcoming phases, starting with **Phase 2: Data Structures**
+* Enhanced repository discoverability and navigation consistency