Add Contact Page and Update Navigation Links

- Updated navigation links across multiple blog pages to replace "Index" with "Home" and added "Contact" link.
- Created a new contact page with a form for user inquiries.
- Added a new contact template to render the contact page content.
- Updated blog index page to enhance structure and styling.
- Added a contact markdown file for content management.

templates/blog_index_page.html

@@ -3,12 +3,15 @@
 {{ end }}
 
 {{ define "blog_index_content" }}
-<h1>Blog Index</h1>
-<ul>
-  {{ range .Posts }}
-    <li><a href="/blog/{{ .Slug }}/">{{ .Title }}</a><br>{{ .Description }}</li>
-  {{ else }}
-    <li>No posts found.</li>
-  {{ end }}
-</ul>
+<div class="main">
+  <h1>Go SSG - Blog Index</h1>
+
+  <ul>
+    {{ range .Posts }}
+      <li><a href="/blog/{{ .Slug }}/">{{ .Title }}</a><br>{{ .Description }}</li>
+    {{ else }}
+      <li>No posts found.</li>
+    {{ end }}
+  </ul>
+</div>
 {{ end }}