Add subscriptions to feed menu

src/invidious/views/components/feed_menu.ecr

@@ -0,0 +1,19 @@
+<div class="h-box pure-g">
+    <div class="pure-u-1-4"></div>
+    <div class="pure-u-1 pure-u-md-1-2">
+        <div class="pure-g">
+            <% feeds = ["Popular", "Top", "Trending"] %>
+            <% if env.get? "user" %>
+            <% feeds << "Subscriptions" %>
+            <% end %>
+            <% feeds.each do |feed| %>
+            <div class="pure-u-1-<%= feeds.size %>">
+                <a href="/feed/<%= feed.downcase %>" style="text-align:center;" class="pure-menu-heading">
+                    <%= translate(locale, feed) %>
+                </a>
+            </div>
+            <% end %>
+        </div>
+    </div>
+    <div class="pure-u-1-4"></div>
+</div>