Added basic test coverage for content tree

Author: juskora

features/standard/ContentTree.feature

@@ -0,0 +1,25 @@
+@IbexaOSS @IbexaHeadless @IbexaCommerce @IbexaExperience @javascript @contenttree
+Feature: Content tree basic operations
+
+  Scenario: It is possible to display items on Content tree
+    Given I create "article" Content items
+      | title       | short_title   | parentPath | language |
+      | Article1    | art1          | root       | eng-GB   |
+      | Article2    | art2          | root       | eng-GB   |
+      | Article3    | art3          | root       | eng-GB   |
+    And I am logged as admin
+    And I'm on Content view Page for "root/art1"
+
+    Scenario: New Content item can be created under chosen nested node
+      Given I am logged as admin
+      And I'm on Content view Page for "root/art1"
+      When I start creating a new content "Article"
+      And I set content fields
+        | label       | value                  |
+        | Title       | Arttest |
+        | Short title | arttest |
+        | Intro       | TestArticleIntro       |
+      And I perform the "Publish" action
+      And I should be on Content view Page for "root/art1/arttest"
+
+