Ios out of band

few bits to sort out
- [x] make our mix of simulator/emulator consistent, settling on emulator
- [x] passing the factory in works great for just in time asset decoding, but its not amazing when you want to decode ahead of time.
- [x] couple of places left to pass this function signature through. (Question) is there a neater way to get this done, feels a bit like we are going back to parameter explosion a bit?
- [x] should do a few examples, i think the complexity grows quite a bit in this one as you add caching, or callbacks
- [x] should get the cached images/fonts to draw on init as well, either warming up cache, or jitting
- [x] examples loading assets from the bundle (also there seem to be actual asset things too? should we use those?!)
- [x] add test
- [x] re-add "preview" project & rev the preview project once this has been deployed. (do this after new ios deploy)
- [x] fix up race condition (see comment)

https://github.com/rive-app/rive/assets/1216025/2c14330f-e8a4-481b-bc27-4807cabe3b82

(simple example, both swift ui and standard)

![CleanShot 2023-11-20 at 16 54 59](https://github.com/rive-app/rive/assets/1216025/a71e207c-30ad-44dd-9e4b-ad7431b22186)

Diffs=
fabb7f97f Ios out of band (#6232)

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

.rive_head

@@ -1 +1 @@
-ed4474d1ab3aa1e68d47cfcb2c178f39c376257e
+fabb7f97fe7b69368c9a7369febfecbc90be49cd

wasm/src/bindings.cpp

@@ -235,7 +235,9 @@ class FileAssetLoaderWrapper : public wrapper<rive::FileAssetLoader>
 public:
     EMSCRIPTEN_WRAPPER(FileAssetLoaderWrapper);
 
-    bool loadContents(rive::FileAsset& asset, rive::Span<const uint8_t> inBandBytes)
+    bool loadContents(rive::FileAsset& asset,
+                      rive::Span<const uint8_t> inBandBytes,
+                      rive::Factory* factory)
     {
         auto bytes =
             emscripten::val(emscripten::typed_memory_view(inBandBytes.size(), inBandBytes.data()));
@@ -253,6 +255,7 @@ rive::File* load(emscripten::val byteArray, rive::FileAssetLoader* fileAssetLoad
     emscripten::val memoryView{emscripten::typed_memory_view(l, rv.data())};
     memoryView.call<void>("set", byteArray);
 
+    // QUESTION (max) we ignore the result currently, we could use it and throw exceptions with it.
     return rive::File::import(rv, jsFactory(), nullptr, fileAssetLoader).release();
 }