Add docs for plugin development

docs/.vitepress/theme/Footer.vue

@@ -6,6 +6,7 @@
         <a href="/docs/user-guide">User Guide</a>
         <a href="/docs/developer-guide">Developer Guide</a>
         <a href="/docs/contributor-guide">Contributor Guide</a>
+        <a href="/reference/index.html" target="_blank">SDK Reference</a>
       </div>
       <div class="column">
         <h4>Legal</h4>
@@ -14,8 +15,8 @@
       </div>
       <div class="column">
         <h4>Links</h4>
-        <a href="https://github.com/MM2-0/Kvaesitso">Github</a>
-        <a href="https://t.me/Kvaesitso">Telegram</a>
+        <a href="https://github.com/MM2-0/Kvaesitso" target="_blank">Github</a>
+        <a href="https://t.me/Kvaesitso" target="_blank">Telegram</a>
       </div>
     </div>
     <p class="copyright">
@@ -36,10 +37,13 @@
       .column {
         display: flex;
         flex-direction: column;
+        row-gap: 0.25rem;
         h4 {
           font-weight: 600;
+          margin-bottom: 0.5rem;
         }
       }
+      gap: 2rem;
     }
     .copyright {
       margin-top: 2rem;