Added new seo

Added robots.txt and sitemap.xml

Author: FebryanHernanda

img/robots.txt

@@ -0,0 +1,3 @@
+User-agent: *
+Allow: /
+Sitemap: https://febryanhernanda.github.io/sitemap.xml

img/sitemap.xml

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">
+  <url>
+    <loc>https://febryanhernanda.github.io/</loc>
+    <changefreq>monthly</changefreq>
+    <priority>1.0</priority>
+  </url>
+</urlset>

index.html

@@ -4,12 +4,22 @@
     <meta charset="UTF-8" />
     <link rel="icon" type="image/svg+xml" href="img/FHLogo-head.png" />
     <meta name="viewport" content="width=device-width, initial-scale=1.0" />
-    <meta name="description" content="Febryan Hernanda Mashudi Portfolio Website" />
-    <meta
-      name="keywords"
-      content="HTML, CSS, JavaScript, ReactJS, Vite, Typescript, Web Development, Front-end Developer,Febryan Hernanda, Febryan Hernanda Mashudi"
-    />
     <meta name="author" content="Febryan Hernanda Mashudi" />
+    <meta name="description" content="Portofolio Febryan Hernanda, Febryan Hernanda Mashudi, Frontend Developer & UI Enthusiast Indonesia.">
+    <meta name="keywords" content="Febryan Hernanda, Febryan Hernanda Mashudi, Frontend Developer, UI Designer, Portofolio, Web Developer Indonesia">
+    <meta name="author" content="Febryan Hernanda">
+    <meta name="robots" content="index, follow">
+    
+    <!-- Open Graph -->
+    <meta property="og:title" content="Portofolio Febryan Hernanda Mashudi" />
+    <meta property="og:description" content="Frontend Developer & UI Enthusiast dari Indonesia." />
+    <meta property="og:image" content="https://febryanhernanda.github.io/preview.png" />
+    <meta property="og:url" content="https://febryanhernanda.github.io/" />
+    
+    <!-- Twitter Card -->
+    <meta name="twitter:card" content="summary_large_image" />
+    
+
     <title>Hello ! I'm Febryan Hernanda</title>
     <script>
       {
@@ -20,8 +30,7 @@
         image: "https://febryanhernanda.github.io/img/FHLogo-head.png",
         sameAs: [
           "https://www.linkedin.com/in/febryan-hernanda-mashudi/",
-          "www.instagram.com/febryaan_hernanda/"
-        ],
+          "www.instagram.com/febryaan_hernanda/"],
         jobTitle: "Front-end Developer",
         worksFor: {
           "@type": "Organization",