feat: enhance modal photo with curly brackets and engaging CTA

- Replace blue border with green curly brackets { } using CSS pseudo-elements
- Add proper spacing and vertical centering with inline-flex
- Add engaging subtext below GitHub button: "Want to know how it's built?"
- Bilingual support for subtext (EN/ES)

templates/index.html

@@ -385,7 +385,9 @@
                 <h2>{{.UI.InfoModal.Title}}</h2>
                 <div class="info-modal-cv-title">
                     CV {{.CurrentYear}} JAMR -
-                    <img src="/static/images/profile/dni.jpeg" alt="JAMR" class="info-modal-photo">
+                    <span class="photo-bracket-wrapper">
+                        <img src="/static/images/profile/dni.jpeg" alt="JAMR" class="info-modal-photo">
+                    </span>
                 </div>
             </div>
 
@@ -418,6 +420,7 @@
                     <span>{{.UI.InfoModal.ViewSource}}</span>
                     <iconify-icon icon="mdi:arrow-right" width="20" height="20"></iconify-icon>
                 </a>
+                <p class="info-modal-github-subtext">{{.UI.InfoModal.ViewSourceSubtext}}</p>
             </div>
         </div>
     </div>