fix: slice title to max 512 characters

[kewde]

This PR truncates the title to 512 characters.

[timlanahan]

oh, this is going to force the title to always be trucated going out of the webview?

[kewde]

Yes, so the onMessageProp listeners also get the truncated value. The drawback though, is that we are forcing this on all WebView usecases.

react-native-webview/src/WebViewShared.tsx

Lines 241 to 243 in ec83a57

	const meta = validateMeta(extractMeta(nativeEvent));
	onMessageProp?.({ ...meta, data });