refactor: Split cpp code base (#6329)

## Summary

This pull requests defines boundaries in C++ layer between Worklet
Runtimes logic and Animations logic. I've only moved files here, more
elaborate refactors will come up in the future.

## Test plan

- [x] Android builds & runs.
- [x] iOS builds & runs.

Author: tjzel

packages/react-native-reanimated/Common/cpp/Registries/EventHandlerRegistry.cpp renamed to packages/react-native-reanimated/Common/cpp/Worklets/Registries/EventHandlerRegistry.cpp

@@ -66,10 +66,11 @@ target_include_directories(
         "${COMMON_SRC_DIR}/cpp/hidden_headers"
         "${COMMON_SRC_DIR}/cpp/LayoutAnimations"
         "${COMMON_SRC_DIR}/cpp/NativeModules"
-        "${COMMON_SRC_DIR}/cpp/ReanimatedRuntime"
-        "${COMMON_SRC_DIR}/cpp/Registries"
-        "${COMMON_SRC_DIR}/cpp/SharedItems"
         "${COMMON_SRC_DIR}/cpp/Tools"
+        "${COMMON_SRC_DIR}/cpp/Worklets/Registries"
+        "${COMMON_SRC_DIR}/cpp/Worklets/SharedItems"
+        "${COMMON_SRC_DIR}/cpp/Worklets/Tools"
+        "${COMMON_SRC_DIR}/cpp/Worklets/WorkletRuntime"
         "${SRC_DIR}/main/cpp"
 )