Merge pull request #14079 from nextcloud/docs/add-nc-34

feat(developer): add changes for Nextcloud 34

Author: provokateurin

developer_manual/app_publishing_maintenance/app_upgrade_guide/index.rst

@@ -11,6 +11,7 @@ These sub pages will cover the most important changes in Nextcloud, as well as s
 .. toctree::
    :maxdepth: 1
 
+   upgrade_to_34.rst
    upgrade_to_33.rst
    upgrade_to_32.rst
    upgrade_to_31.rst

developer_manual/app_publishing_maintenance/app_upgrade_guide/upgrade_to_34.rst

@@ -0,0 +1,73 @@
+=======================
+Upgrade to Nextcloud 34
+=======================
+
+Front-end changes
+-----------------
+
+Added APIs
+^^^^^^^^^^
+
+- TBD
+
+Changed APIs
+^^^^^^^^^^^^
+
+- TBD
+
+Deprecated APIs
+^^^^^^^^^^^^^^^
+
+- TBD
+
+Removed APIs
+^^^^^^^^^^^^
+
+- ``OC.Dialogs.fileexists`` was deprecated and is now removed.
+  Use the conflict picker from the ``@nextcloud/dialogs`` library instead.
+- ``OC.Notifications`` was deprecated and is now removed.
+  Use the notification API from the ``@nextcloud/dialogs`` library instead.
+- ``OC.Apps`` was deprecated and is now removed.
+  Use Vue components from the ``@nextcloud/vue`` instead.
+- ``OC.*menu*`` methods were deprecated and are now removed.
+  Use Vue components from the ``@nextcloud/vue`` instead.
+- Magic handling of ``.live-relative-timestamp`` (elements with this class were automatically updated to show relative timestamps) was removed.
+  Use the ``NcDateTime`` component from the ``@nextcloud/vue`` library instead
+- The global ``snapper`` was deprecated and is now removed.
+  For the app navigation please migrate your app to Vue
+  and use the ``NcAppNavigation`` component from the ``@nextcloud/vue`` library instead.
+- Some deprecated globally shared libraries were removed. If you still rely on them, you need to bundle them with your app:
+
+  - ``jQuery`` was deprecated and scheduled for removal since Nextcloud 19.
+  - ``jQuery UI`` was deprecated and scheduled for removal since Nextcloud 19.
+  - ``Backbone`` was deprecated and scheduled for removal since Nextcloud 19.
+  - ``OC.Files.Client`` as it was extending the ``Backbone``.
+
+
+Back-end changes
+----------------
+
+Added Events
+^^^^^^^^^^^^
+
+- TBD
+
+Added APIs
+^^^^^^^^^^
+
+- TBD
+
+Changed APIs
+^^^^^^^^^^^^
+
+- TBD
+
+Deprecated APIs
+^^^^^^^^^^^^^^^
+
+- TBD
+
+Removed APIs
+^^^^^^^^^^^^
+
+- TBD