Add UI for viewing and changing trust setting in repo

static/js/directives/ui/repository-signing-config/repository-signing-config.component.html

@@ -0,0 +1,65 @@
+<div class="repository-signing-config-element" quay-require="['SIGNING']">
+  <div class="repository-events-table-element">
+    <div class="co-panel">
+      <div class="co-panel-heading">
+        <i class="fa ci-shield-check-full"></i> Trust and Signing
+      </div>
+      <div class="panel-body">
+        <table>
+        <tr>
+        <td>
+        <i class="fa status-icon"
+           ng-class="{'ci-shield-check-outline': $ctrl.repository.trust_enabled, 'ci-shield-none': !$ctrl.repository.trust_enabled}"></i>
+        </td>
+        <td>
+        <div ng-if="$ctrl.repository.trust_enabled">
+          <h4>Content Trust Enabled</h4>
+          <p>
+            Content Trust and Signing is enabled on this repository and all tag operations must be signed via Docker Content Trust.
+          </p>
+          <p>
+            Note that due to this feature being enabled, all UI-based tag operations and all build support is <strong>disabled on this repository</strong>.
+          </p>
+          <button class="btn btn-danger" ng-click="$ctrl.askChangeTrust(false)">Disable Content Trust</button>
+        </div>
+
+        <div ng-if="!$ctrl.repository.trust_enabled">
+          <h4>Content Trust Disabled</h4>
+          <p>
+            Content Trust and Signing is disabled on this repository.
+          </p>
+          <button class="btn btn-default" ng-click="$ctrl.askChangeTrust(true)">Enable Content Trust</button>
+        </div>
+        </td>
+        </tr>
+        </table>
+      </div>
+  </div>
+
+  <!-- Change trust dialogs -->
+  <div class="cor-confirm-dialog"
+     dialog-context="$ctrl.enableTrustInfo"
+     dialog-action="$ctrl.changeTrust(true, callback)"
+     dialog-title="Enable Content Trust"
+     dialog-action-title="Enable Trust">
+     <p>Click "Enable Trust" to enable content trust on this repository.</p>
+     <p>Please note that at this time, having content trust will <strong>disable</strong> the following
+        features under the repository:
+        <ul>
+          <li>Any tag operations in the UI (Add Tag, Delete Tag, Restore Tag)
+          <li>All build triggers and ability to invoke builds
+        </ul>
+     </p>
+  </div>
+
+  <div class="cor-confirm-dialog"
+     dialog-context="$ctrl.disableTrustInfo"
+     dialog-action="$ctrl.changeTrust(false, callback)"
+     dialog-title="Disable Content Trust"
+     dialog-action-title="Disable Trust and Delete Data">
+     <div class="co-alert co-alert-warning">
+      <strong>Warning:</strong> Disabling content trust will prevent users from pushing signed
+      manifests to this repository and will <strong>delete all existing signing and trust data</strong>.
+     </div>
+  </div>
+</div>