Add FAQ in footer + update X (twitter) icon

Author: shravanngoswamii

_quarto.yml

@@ -50,7 +50,7 @@ website:
           - text: All Versions
             href: https://turinglang.org/docs/versions.html
     tools:
-      - icon: twitter
+      - icon: twitter-x
         text: Turing Twitter
         href: https://x.com/TuringLang
       - icon: chat-dots
@@ -173,6 +173,7 @@ format:
                     <h5>Explore</h5>
                     <a href="https://turinglang.org/docs/getting-started/">Get Started</a>
                     <a href="https://turinglang.org/docs/tutorials/">Tutorials</a>
+                    <a href="https://turinglang.org/docs/faq/">FAQ</a>
                     <a href="https://turinglang.org/library/">Libraries</a>
                     <a href="https://turinglang.org/news/">News</a>
                     <a href="https://turinglang.org/team/">Team</a>
@@ -181,7 +182,7 @@ format:
                   <div class="footer-column footer-connect">
                     <h5>Connect</h5>
                     <a href="https://github.com/TuringLang" target="_blank" rel="noopener"><i class="bi bi-github"></i> GitHub</a>
-                    <a href="https://x.com/TuringLang" target="_blank" rel="noopener"><i class="bi bi-twitter"></i> Twitter</a>
+                    <a href="https://x.com/TuringLang" target="_blank" rel="noopener"><i class="bi bi-twitter-x"></i> Twitter</a>
                     <a href="https://julialang.slack.com/archives/CCYDC34A0" target="_blank" rel="noopener"><i class="bi bi-slack"></i> Slack</a>
                     <a href="https://discourse.julialang.org/c/domain/probprog/48" target="_blank" rel="noopener"><i class="bi bi-chat-dots"></i> Discourse</a>
                   </div>