Add Ballerina Language Reference guide and update navigation labels

Author: hasithaa

docs/index.md

@@ -43,6 +43,14 @@ CodeSeekers Endless Programming Languages Meetup · 2022 · [Related project →
 
 ---
 
+## Guides
+
+### [Ballerina Language Reference](https://hasithaa.github.io/ballerina-reference-guide/) *(WIP)*
+
+A language reference for Ballerina — covering the structural type system, worker-based concurrency, and data-oriented design from first principles.
+
+---
+
 ## Projects
 
 ### [Ballerina Workflow](projects/index.md#ballerina-workflow) · 2026

docs/projects/index.md

@@ -1,8 +1,8 @@
 ---
-title: "About Me"
+title: "Portfolio"
 ---
 
-# :rocket: About Me
+# 🧑‍💻 Portfolio
 
 ## [WSO2](https://wso2.com) · Architect — Integration BU · Compiler Developer — Ballerina Platform
 

mkdocs.yml

@@ -56,14 +56,15 @@ markdown_extensions:
       permalink: true
 
 nav:
-  - Home: index.md
-  - Blog:
+  - 🏠 Home: index.md
+  - 📝 Blog:
       - blog/index.md
       - Ballerina Integrator Journey: blog/2025/wso2con-ballerina-integrator.md
       - Programming Languages and Compilers: blog/2025/wso2-tech-conf-compilers.md
       - Setup Ballerina Action: blog/2023/setup-ballerina.md
       - Ballerina Identifiers: blog/2023/ballerina-identifiers.md
       - Ballerina Meetup: blog/2022/meetup.md
       - My Old Blog: blog/old.md
-  - About Me:
-      - projects/index.md
+  - 📚 Guides:
+      - Ballerina Language Reference ↗: https://hasithaa.github.io/ballerina-reference-guide/
+  - 🧑‍💻 Portfolio: projects/index.md