Activate the new Repository creation workflow

Summary:
Ref T2231. This:

  - Activates the new multi-step workflow, and exposes it in the UI.
  - Adds "can create", "default view" and "default edit" capabilities.
  - Provides a default value for `repository.default-local-path` and forces repositories into it by default. It's still editable, but Phabricator gets it correct (for some definition of correct) by default now.

Test Plan: Created some new repositories with the new workflow.

Reviewers: btrahan

Reviewed By: btrahan

CC: aran

Maniphest Tasks: T1286, T2231

Differential Revision: https://secure.phabricator.com/D7413

src/applications/diffusion/controller/DiffusionRepositoryListController.php

@@ -90,7 +90,6 @@ final class DiffusionRepositoryListController extends DiffusionController
     $nav = new AphrontSideNavFilterView();
     $nav->setBaseURI(new PhutilURI($this->getApplicationURI()));
 
-
     id(new PhabricatorRepositorySearchEngine())
       ->setViewer($viewer)
       ->addNavigationItems($nav->getMenu());
@@ -100,6 +99,22 @@ final class DiffusionRepositoryListController extends DiffusionController
     return $nav;
   }
 
+  public function buildApplicationCrumbs() {
+    $crumbs = parent::buildApplicationCrumbs();
+
+    $can_create = $this->hasApplicationCapability(
+      DiffusionCapabilityCreateRepositories::CAPABILITY);
+
+    $crumbs->addAction(
+      id(new PHUIListItemView())
+        ->setName(pht('Import Repository'))
+        ->setHref($this->getApplicationURI('/create/'))
+        ->setDisabled(!$can_create)
+        ->setIcon('create'));
+
+    return $crumbs;
+  }
+
   private function buildShortcuts() {
     $shortcuts = id(new PhabricatorRepositoryShortcut())->loadAll();
     if ($shortcuts) {