feat(pastes): add new page to show owned pastes

Signed-off-by: SphericalKat <amolele@gmail.com>

lib/ketbin_web/templates/layout/_user_menu.html.heex

@@ -20,6 +20,7 @@ function toggleDropdown() {
             <div id="dropdown" class="hidden right-0 z-50 bg-[#313131] px-4 py-2">
                 <li><%= link "Settings", to: Routes.user_settings_path(@conn, :edit) %></li>
                 <li><%= link "Log out", to: Routes.user_session_path(@conn, :delete), method: :delete %></li>
+                <li><%= link "My Pastes", to: Routes.page_path(@conn, :pastes) %></li>
             </div>
         </div>
 	<% else %>