refactor(baseof): added site_footer partial to replace multiple footer partials

layouts/partials/site_footer.html

@@ -0,0 +1,29 @@
+<div class="container">
+  <footer class="site-footer">
+    {{ with site.GetPage "privacy.md" }}
+    <p class="powered-by">
+      {{ printf "<a href=\"%s\">%s</a>" .RelPermalink .Title | safeHTML }}
+    </p>
+    {{ end }}
+
+    <p class="powered-by">
+      {{ with site.Copyright }}{{ replace . "{year}" now.Year | markdownify}} &middot; {{ end }}
+
+      Powered by the
+      <a href="https://sourcethemes.com/academic/" target="_blank" rel="noopener">Academic theme</a> for
+      <a href="https://gohugo.io" target="_blank" rel="noopener">Hugo</a>.
+
+      {{ if ne .Type "docs" }}
+      <span class="float-right" aria-hidden="true">
+        <a href="#" id="back_to_top">
+          <span class="button_icon">
+            <i class="fas fa-chevron-up fa-2x"></i>
+          </span>
+        </a>
+      </span>
+      {{ end }}
+    </p>
+  </footer>
+</div>
+
+{{ partial "citation.html" . }}