make sure we force embedded assets when exporting for cloud renderer …

…preview

fixes an issue when hosted/referenced is set for assets for the cloud renderer.

by either producing a zip file or a file without the assets (both of which do not work well when previewing the render)

removed a few things that were flagged up as warnings as well.

i ignored an extra dependency for editor though:
```
  just_audio: ^0.9.36
```

gonna have a quick look if i can add a test...

Diffs=
acdaee21f make sure we force embedded assets when exporting for cloud renderer … (#6536)

Co-authored-by: Maxwell Talbot <talbot.maxwell@gmail.com>

.gitignore

diff --git a/.gitignore b/.gitignore
index fcfc1de..10559a6 100644
--- a/.gitignore
+++ b/.gitignore
@@ -79,6 +79,7 @@
 /skia/viewer/imgui.ini
 /skia/viewer/build/macosx
 /skia/thumbnail_generator/build/macosx
+/skia/thumbnail_generator/build/dependencies
 /build/macosx
 /build/android
 /skia/dependencies/skia_rive_optimized

.rive_head

diff --git a/.rive_head b/.rive_head
index c239ec4..71b8716 100644
--- a/.rive_head
+++ b/.rive_head
@@ -1 +1 @@
-353cf349b814001d50329fa3630e87a93069a4b9
+acdaee21fea7a690e2db6d01b8a6d2cd150f1db7