Add Text Length Checker tool with comprehensive text analysis features

- Add new TextLengthTool.js with real-time text statistics
- Features: character/word/line/sentence/paragraph counting, reading time estimation
- Add Text Length Checker to navigation (ToolSidebar, Layout, App routing)
- Add Text Length Checker card to homepage
- Fix button styling with flex alignment for better UX
- Route: /text-length with Type icon from lucide-react

src/components/ToolLayout.js

@@ -1,20 +1,10 @@
 import React from 'react';
-import { ArrowLeft } from 'lucide-react';
-import { Link } from 'react-router-dom';
 
 const ToolLayout = ({ title, description, children, icon: Icon }) => {
   return (
     <div className="max-w-6xl mx-auto">
       {/* Header */}
       <div className="mb-8">
-        <Link
-          to="/"
-          className="inline-flex items-center text-primary-600 hover:text-primary-700 mb-4"
-        >
-          <ArrowLeft className="h-4 w-4 mr-2" />
-          Back to Tools
-        </Link>
-        
         <div className="flex items-center space-x-3 mb-2">
           {Icon && <Icon className="h-8 w-8 text-primary-600" />}
           <h1 className="text-3xl font-bold text-gray-900 dark:text-white">