docs: update documentation structure and examples for Arrays & Strings guide

docs/content/01-coding/01-arrays-and-strings/03-reverse-string.mdx

@@ -0,0 +1,4 @@
+---
+sidebar:
+  icon: circle-question-mark
+---

docs/content/01-coding/01-arrays-and-strings/meta.ts

@@ -1,5 +1,6 @@
 import { defineMeta } from "blume";
 
 export default defineMeta({
+  title: "Arrays & Strings",
   order: 4,
 });

docs/content/01-coding/index.mdx

@@ -4,7 +4,7 @@ description: 'There are only 6 structural families. Every pattern is a traversal
 sidebar:
   label: Introduction
   order: 1
-  icon: code
+  icon: power
 ---
 
 

docs/content/index.mdx

@@ -2,7 +2,7 @@
 title: Goals
 description: Welcome to your new Blume docs.
 sidebar:
-  icon: play
+  icon: crosshair
 ---
 
 ## Coding Patterns