DEV: Add more placeholders (#36)

* TODO for the meta_topic_id
* TODO for the root plugin site setting key, so all settings don't end
  up in the Plugins category
* TODO for the translation of the plugin category name, which maps
  to the root plugin site setting key

Author: martin-brennan

config/locales/client.en.yml

@@ -1,4 +1,9 @@
 en:
+  admin_js:
+    admin:
+      site_settings:
+        categories:
+          TODO_plugin_name: "Plugin Name"
   js:
     discourse_plugin_name:
       placeholder: placeholder

config/settings.yml

@@ -1,4 +1,4 @@
-plugins:
+TODO_plugin_name:
   plugin_name_enabled:
     default: false
     client: true

plugin.rb

@@ -2,6 +2,7 @@
 
 # name: discourse-plugin-name
 # about: TODO
+# meta_topic_id: TODO
 # version: 0.0.1
 # authors: Discourse
 # url: TODO