feat: Native ads support for React Native

[elijahdev0]

Summary

Adds Native ads support to the React Native SDK (Android + iOS + JS) — the only Appodeal ad format that was missing from the RN bridge.

Two ways to render native ads:

1. Stock templates — drop-in views (newsFeed / appWall / contentStream), same as the native Android/iOS SDKs
2. Composable assets — AdMob-style JSX layout (AppodealNativeAdView + media/icon/title/description/CTA/attribution children) so apps can style native ads in React Native without custom native modules

API

Module

• AppodealAdType.NATIVE
• cacheNativeAds(count), getNativeAds(count), getAvailableNativeAdsCount(), destroyNativeAd(id)
• setPreferredNativeContentType(type)
• AppodealNativeEvents (onNativeLoaded, onNativeFailedToLoad, onNativeShown, onNativeClicked, onNativeExpired)

Stock template view

<AppodealNative adId={id} placement="default" adTemplate="contentStream" />

Composable (custom layout)

<AppodealNativeAdView adId={id} placement="default">
  <AppodealNativeMediaView style={...} />
  <AppodealNativeIconView style={...} />
  <AppodealNativeTitleView style={...} />
  <AppodealNativeDescriptionView style={...} />
  <AppodealNativeCallToActionView style={...} />
  <AppodealNativeAttributionView style={...} />
</AppodealNativeAdView>

Platform notes

• Android: Appodeal.NATIVE, NativeCallbacks, ad store, stock NativeAdView* templates + composable NativeAdView with asset binding
• iOS: APDNativeAdQueue store + getViewForPlacement / custom asset views

Test plan

• Initialize with AppodealAdType.NATIVE on Android/iOS
• cacheNativeAds → onNativeLoaded → getNativeAds(1) returns metadata
• <AppodealNative adId=... adTemplate="contentStream" /> shows a stock template
• <AppodealNativeAdView> + asset children render a custom layout
• Existing interstitial / rewarded / banner / MREC still work