add install notice to plugin manager

languages/en_CA.json

@@ -659,6 +659,7 @@
    "Creation Interval": "Creation Interval",
    "Plugin": "Plugin",
    "Plugins": "Plugins",
+   "pluginDownloadText": "Learn about <a href='https://docs.shinobi.video/plugin/install' target='_blank'>installing plugins</a> in the Documentation.",
    "Plugin Manager": "Plugin Manager",
    "Download Plugins": "Download Plugins",
    "MonitorStatesText": "You can learn about how to use this <a href='https://hub.shinobi.video/articles/view/6ylYHj9MemlZwrM' target='_blank'>here on ShinobiHub</a>.",

web/pages/blocks/superPluginManager.ejs

@@ -5,6 +5,7 @@
                 <%- lang['Download Plugins'] %>
             </div>
             <div class="card-body">
+                <p><%- lang.pluginDownloadText %></p>
                 <div class="form-group">
                     <select class="form-control" id="pluginQuickSelect">
                         <% [