docs: add UTF-8 support guide (#7091)

Author: himabindu-1614

docs/utf8-support.md

@@ -0,0 +1,21 @@
+# Enabling UTF-8 Support in Cortex
+
+This guide explains how to enable UTF-8 support in Cortex.
+
+## Why UTF-8 Support?
+UTF-8 ensures that all Unicode characters are correctly stored and displayed. This is essential for internationalization and working with non-ASCII data.
+
+## Prerequisites
+- Cortex v1.x or higher
+- Environment set up for Cortex
+- YAML/JSON configuration files
+
+## Configuration Steps
+
+1. Open your Cortex configuration file (e.g., `cortex-config.yaml`).  
+2. Add or update the encoding section:
+
+```yaml
+server:
+  encoding: UTF-8
+