[BUG] [iOS] Playlist item build failures are silently discarded by try? #250

Describe the bug

In the playlist-only setConfig branch (ios/RNJWPlayer/RNJWPlayerView.swift):

if let playerItem = try? getPlayerItem(item: item as! [String: Any]) {
    playlistArray.append(playerItem)
}

The try? discards the error. A malformed item is dropped with no signal to JS — no event, no warning, no count. The resulting playlistArray may be partially or entirely empty, and loadPlaylist is then called with it, indistinguishable from success.

Expected behavior

An item that fails to build should be observable from the React Native side — e.g. an onPlayerWarning per dropped item carrying the underlying error, and/or a count of items actually loaded.

Impact / why this matters

This directly cost us investigation time on #248. We could not exclude "the array arrived empty" as the cause without reading the module's Swift source, because nothing about the failure is observable from JS.

For a library where the playlist is supplied from application state, silent partial loading is a difficult class of bug to diagnose from the consumer side.

Additional context

Unchanged in 1.7.0 and on main. Related: #248, and #115 where item construction was rejecting valid input.