Add pages on exporting and compiling for visionOS

Since the instructions are basically identical to iOS, this links
to the respective iOS exporting/compiling pages (with a reminder
that visionOS support is still limited for now).

tutorials/export/exporting_for_visionos.rst

@@ -0,0 +1,19 @@
+.. _doc_exporting_for_visionos:
+
+Exporting for visionOS
+======================
+
+.. seealso::
+
+    This page describes how to export a Godot project to visionOS.
+    If you're looking to compile export template binaries from source instead,
+    see :ref:`doc_compiling_for_visionos`.
+
+Exporting instructions for visionOS are currently identical to
+:ref:`doc_compiling_for_ios`, except you should add a **visionOS**
+export preset instead of **iOS**. See the linked page for details.
+
+.. note::
+
+    Note that currently, only exporting an application for use on a flat
+    plane within the headset is supported. Immersive experiences are not supported.

tutorials/export/index.rst

@@ -8,7 +8,7 @@ Export
 .. seealso::
 
    This section is about exporting a build of your project. If you're trying
-   to export properties from a script, see :ref:`doc_gdscript_exports` or 
+   to export properties from a script, see :ref:`doc_gdscript_exports` or
    :ref:`doc_c_sharp_exports`.
 
 .. toctree::
@@ -18,14 +18,15 @@ Export
    exporting_projects
    exporting_pcks
    feature_tags
+   exporting_for_windows
    exporting_for_linux
    exporting_for_macos
-   running_on_macos
-   exporting_for_windows
-   changing_application_icon_for_windows
-   exporting_for_ios
    exporting_for_android
-   android_gradle_build
+   exporting_for_ios
+   exporting_for_visionos
    exporting_for_web
-   exporting_for_dedicated_servers
+   changing_application_icon_for_windows
+   running_on_macos
+   android_gradle_build
    one-click_deploy
+   exporting_for_dedicated_servers