profile-mode : add buttons

ex.
params:
  profileMode:
    buttons:
      - name: Archive
        url: "/archive"
      - name: Github
        url: "https://github.com/"

layouts/partials/indexProfile.html

@@ -12,5 +12,10 @@
             {{ partial "social-icons.html" . }}
         </div>
         {{- end }}
+        {{- with .Site.Params.profileMode.buttons }}
+        <div class="buttons">
+            {{ partial "indexProfileButtons.html" . }}
+        </div>
+        {{- end }}
     </div>
 </div>

layouts/partials/indexProfileButtons.html

@@ -0,0 +1,7 @@
+{{ range . -}}
+<span class="button">
+    <a href="{{ .url }}" rel="noopener" title="{{ .name | humanize }}">
+        <span class="button-inner">{{ .name }}</span>
+    </a>
+</span>
+{{- end -}}