feat: add UTM params to superdoc.dev links for traffic attribution

Author: caiopizzol

apps/web/index.html

@@ -884,7 +884,7 @@
       <h1>The largest classified corpus of Word documents</h1>
       <p class="hero-sub">.docx files from the public web, classified into document types and topics across dozens of
         languages.</p>
-      <p class="hero-by">Built by 🦋 <a href="https://superdoc.dev/">SuperDoc</a></p>
+      <p class="hero-by">Built by 🦋 <a href="https://superdoc.dev/?utm_source=docxcorp.us&utm_medium=referral&utm_campaign=hero">SuperDoc</a></p>
       <div class="numbers">
         <div>
           <div class="num-val" id="stat-docs"><span class="skeleton skeleton-num"></span></div>
@@ -977,7 +977,7 @@ <h1>The largest classified corpus of Word documents</h1>
   </div>
 
   <div class="site-footer">
-    <span>Built by <a href="https://superdoc.dev">SuperDoc</a></span>
+    <span>Built by <a href="https://superdoc.dev/?utm_source=docxcorp.us&utm_medium=referral&utm_campaign=footer">SuperDoc</a></span>
     <span>Takedown requests: <a href="mailto:help@docxcorp.us">help@docxcorp.us</a></span>
   </div>
 
@@ -986,7 +986,7 @@ <h1>The largest classified corpus of Word documents</h1>
       <div class="preview-header">
         <div class="preview-title" id="preview-title">document.docx</div>
         <div class="preview-actions">
-          <span class="preview-badge">Powered by<a href="https://superdoc.dev" target="_blank">🦋 SuperDoc</a></span>
+          <span class="preview-badge">Powered by<a href="https://superdoc.dev/?utm_source=docxcorp.us&utm_medium=referral&utm_campaign=preview" target="_blank">🦋 SuperDoc</a></span>
           <a class="preview-dl" id="preview-dl" href="#" download>Download</a>
           <button class="preview-close" id="preview-close">Close</button>
         </div>