Allow .res and .tres extensions in the scene CLI positional argument

[Calinou]

This closes #35709.

Edit: Disallowing to save scenes with .res or .tres extensions is probably a better idea, see below.

[bruvzg]

macOS editor bundle .plist should be also changed to make it openable from Finder (.res and .tres are already registered as public.res to set icon, but not marked as editable documents).

diff --git a/misc/dist/osx_tools.app/Contents/Info.plist b/misc/dist/osx_tools.app/Contents/Info.plist
index c519a232c4..e918a74605 100755
--- a/misc/dist/osx_tools.app/Contents/Info.plist
+++ b/misc/dist/osx_tools.app/Contents/Info.plist
@@ -55,6 +55,18 @@
 				<string>public.tscn</string>
 			</array>
 		</dict>
+		<dict>
+			<key>CFBundleTypeRole</key>
+			<string>Editor</string>
+			<key>LSItemContentTypes</key>
+			<array>
+				<string>public.res</string>
+			</array>
+			<key>NSExportableTypes</key>
+			<array>
+				<string>public.res</string>
+			</array>
+		</dict>
 		<dict>
 			<key>CFBundleTypeRole</key>
 			<string>Editor</string>

[Calinou]

@bruvzg Not all resources are Godot scenes, though. This is kind of an edge case; you generally never save a scene with a .res or .tres extension, but Godot doesn't prevent you from doing so.

If we prevent the Godot editor from doing so (which is probably a good idea), this PR would become redundant.

[aaronfranke]

We should probably also disallow saving new scenes with .res or .tres.

[akien-mga]

Thanks!

[akien-mga]

Cherry-picked for 3.2.2.