Add Markdown support and update member features

The commit adds Markdown rendering capabilities and makes several UI/UX
improvements across member-related features including profile display,
peer support badges, and navigation structure.

Includes:
- Added @tailwindcss/typography plugin
- New Markdown rendering composable
- Simplified member navigation links
- Enhanced member profile layout and styling
- Added peer support badge component
- Improved mobile responsiveness
- Removed redundant icons and simplified UI

app/pages/join.vue

@@ -430,9 +430,10 @@
                   Join the community
                 </h3>
                 <p class="text-[--ui-text]">
-                  Get instant access to everything. Fill out your profile, agree
-                  to our community guidelines, and complete payment (if
-                  applicable). You'll get instant access to our community.
+                  Get access to everything. Fill out your profile, agree to our
+                  community guidelines, and complete payment (if applicable).
+                  You'll get access to our community as soon as we review your
+                  application.
                 </p>
               </div>
             </div>