Add terminal introduction to index.md

Added introductory terminal section to the index page.

Author: microbitcoder652

index.md

@@ -7,3 +7,8 @@ author_profile: true
 
 Welcome to Arya's Coding World!  
 Check out my micro:bit projects and coding adventures.
+
+<div class="terminal-intro">
+  <p>> Welcome to Arya’s Lab...</p>
+  <p>> Building with micro:bit magic.</p>
+</div>