Allow Spaces to be archived

Summary:
Ref T8377. This adds a standard disable/enable feature to Spaces, with a couple of twists:

  - You can't create new stuff in an archived space, and you can't move stuff into an archived space.
  - We don't show results from an archived space by default in ApplicationSearch queries. You can still find these objects if you explicitly search for "Spaces: <the archived space>".

So this is a "put it in a box in the attic" sort of operation, but that seems fairly nice/reasonable.

Test Plan:
  - Archived and activated spaces.
  - Used ApplicationSearch, which omitted archived objects by default but allowed searches for them, specifically, to succeed.
  - Tried to create objects into an archived space (this is not allowed).
  - Edited objects in an archived space (this is OK).

Reviewers: btrahan

Reviewed By: btrahan

Subscribers: epriestley

Maniphest Tasks: T8377

Differential Revision: https://secure.phabricator.com/D13238

src/applications/spaces/application/PhabricatorSpacesApplication.php

@@ -38,6 +38,15 @@ final class PhabricatorSpacesApplication extends PhabricatorApplication {
     return true;
   }
 
+  public function getHelpDocumentationArticles(PhabricatorUser $viewer) {
+    return array(
+      array(
+        'name' => pht('Spaces User Guide'),
+        'href' => PhabricatorEnv::getDoclink('Spaces User Guide'),
+      ),
+    );
+  }
+
   public function getRemarkupRules() {
     return array(
       new PhabricatorSpacesRemarkupRule(),
@@ -51,6 +60,8 @@ final class PhabricatorSpacesApplication extends PhabricatorApplication {
         '(?:query/(?P<queryKey>[^/]+)/)?' => 'PhabricatorSpacesListController',
         'create/' => 'PhabricatorSpacesEditController',
         'edit/(?:(?P<id>\d+)/)?' => 'PhabricatorSpacesEditController',
+        '(?P<action>activate|archive)/(?P<id>\d+)/'
+          => 'PhabricatorSpacesArchiveController',
       ),
     );
   }