Cross-reference compiling and exporting pages, rename OSX/Mac to macOS

There's a lot of confusion between compiling Godot and exporting projects.

This aims to resolve part of the confusion by cross-linking other pages
for each platform.

(cherry picked from commit 955c97bb1d)

development/compiling/compiling_for_android.rst

@@ -5,6 +5,11 @@ Compiling for Android
 
 .. highlight:: shell
 
+.. seealso::
+
+    This page describes how to compile Android export template binaries from source.
+    If you're looking to export your project to Android instead, read :ref:`doc_exporting_for_android`.
+
 Note
 ----
 

development/compiling/compiling_for_ios.rst

@@ -5,6 +5,11 @@ Compiling for iOS
 
 .. highlight:: shell
 
+.. seealso::
+
+    This page describes how to compile iOS export template binaries from source.
+    If you're looking to export your project to iOS instead, read :ref:`doc_exporting_for_ios`.
+
 Requirements
 ------------
 

development/compiling/compiling_for_osx.rst

@@ -5,6 +5,11 @@ Compiling for macOS
 
 .. highlight:: shell
 
+.. note::
+
+    This page describes how to compile macOS editor and export template binaries from source.
+    If you're looking to export your project to macOS instead, read :ref:`doc_exporting_for_macos`.
+
 Requirements
 ------------
 

development/compiling/compiling_for_uwp.rst

@@ -5,6 +5,11 @@ Compiling for Universal Windows Platform
 
 .. highlight:: shell
 
+.. seealso::
+
+    This page describes how to compile UWP export template binaries from source.
+    If you're looking to export your project to UWP instead, read :ref:`doc_exporting_for_uwp`.
+
 Requirements
 ------------
 

development/compiling/compiling_for_web.rst

@@ -3,6 +3,11 @@
 Compiling for the Web
 =====================
 
+.. seealso::
+
+    This page describes how to compile HTML5 editor and export template binaries from source.
+    If you're looking to export your project to HTML5 instead, read :ref:`doc_exporting_for_web`.
+
 .. highlight:: shell
 
 Requirements

development/compiling/compiling_for_windows.rst

@@ -5,6 +5,11 @@ Compiling for Windows
 
 .. highlight:: shell
 
+.. seealso::
+
+    This page describes how to compile Windows editor and export template binaries from source.
+    If you're looking to export your project to Windows instead, read :ref:`doc_exporting_for_windows`.
+
 Requirements
 ------------
 

development/compiling/compiling_for_x11.rst

@@ -5,6 +5,11 @@ Compiling for X11 (Linux, \*BSD)
 
 .. highlight:: shell
 
+.. seealso::
+
+    This page describes how to compile Linux editor and export template binaries from source.
+    If you're looking to export your project to Linux instead, read :ref:`doc_exporting_for_linux`.
+
 Requirements
 ------------