docs: add centered dividers for better visual organization

- use centered div sections for all major headings
- improves visual hierarchy and readability
- matches style from CONTRIBUTING.md

Author: xcutiboo

README.md

@@ -121,7 +121,10 @@ The exported file includes a header with generation date, config path, and reloa
 
 ---
 
-## 🛠️ Development
+<div align="center">
+  <hr>
+  <h2>� Development</h2>
+</div>
 
 ### Prerequisites
 - **Bun 1.3+** (recommended) or Node.js 20+
@@ -191,10 +194,12 @@ If Confitty saved you from reading Kitty docs for three hours, consider supporti
 
 Donations help keep the website running and the confetti cannon loaded for our mascot. 🎉
 
----
+<div align="center">
 
 ## 💬 Community
 
+</div>
+
 Join the [**Discord server**](https://discord.gg/kxG674AadQ) to:
 - Share your Kitty configs and setups
 - Get help with configuration issues