Convert all iOS includes to angle-bracket imports

[tomekzaw]

Summary

This PR changes the way headers are imported in apple/ directory.

Previously, we had the following kinds of imports:

• #import <RNReanimated/REAModule.h> – okay
• #import <RNReanimated/REASnapshot.h> – not good, REASnapshot.h is located in apple/LayoutReanimation/REASnapshot.h
• #import <ReanimatedSensorContainer.h> – not good, RNReanimated/ is missing
• #include <memory> – #import is better than #include since it guarantees to actually paste the contents of the header file at most once and is reported to improve build times slightly

First, I've decided to add apple/ in the include paths. The reason is to avoid potential conflicts with headers from Common/cpp/ (perhaps that's why there's LayoutAnimations in common codebase and LayoutReanimation in Apple codebase?) and also indicate that the header is Apple-only. Another reason is to prevent importing headers directly from RNReanimated/*.h. Finally, I think it looks cool.

-#import <RNReanimated/REAModule.h>
+#import <RNReanimated/apple/REAModule.h>

Next, I fixed the header include paths so that they represent the actual directory tree in apple/, including intermediate directories like sensor or keyboardObserver. This also makes it easier to group imports since they are automatically reordered during yarn format:apple.

-#import <RNReanimated/REASnapshot.h>
+#import <RNReanimated/apple/LayoutReanimation/REASnapshot.h>

Then, I fixed imports of headers from worklets subspec:

-#import <RNReanimated/WorkletRuntime.h>
+#import <worklets/WorkletRuntime/WorkletRuntime.h>

I also fixed some direct imports:

-#import <REASlowAnimations.h>
+#import <RNReanimated/apple/REASlowAnimations.h>

Finally, I changed all #include to #import (actually, the use of #include in apple/ directory is now disallowed and guarded by CI):

-#include <jsi/jsi.h>
+#import <jsi/jsi.h>

Test plan

See if CI is green.