feat(android): allow custom OkHttpClient via factory

[whydidoo]

Replace direct OkHttpClient instantiation with a configurablefactory in companion object, enabling custom client configuration(SSL, interceptors, timeouts) from the host application.

Summary

Currently, RemoteScriptLoader creates a hardcoded OkHttpClient() instance with no way to customize it. This is a problem for apps that need custom HTTP configuration — for example, certificate pinning, custom SSL trust managers, logging interceptors, or proxy settings.

This PR introduces a static okHttpClientFactory lambda in a companion object, allowing host applications to provide their own OkHttpClient instance before any network requests are made:

RemoteScriptLoader.okHttpClientFactory = {
    OkHttpClient.Builder()
        .addInterceptor(loggingInterceptor)
        .sslSocketFactory(sslSocketFactory, trustManager)
        .connectTimeout(30, TimeUnit.SECONDS)
        .build()
}

The client is lazily initialized via by lazy, so the factory is only called once on the first use.

Test plan

1. Default behavior — verify that without setting okHttpClientFactory, a default OkHttpClient() is used (no regression).
2. Custom client — set okHttpClientFactory in Application.onCreate() or a React Native module initializer with a custom interceptor, confirm the interceptor is invoked during remote script loading.
3. Lazy initialization — confirm the factory is called only once, regardless of how many scripts are loaded.

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[changeset-bot]

🦋 Changeset detected

Latest commit: 23fc64d

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 6 packages

Name	Type
@callstack/repack	Major
@callstack/repack-plugin-expo-modules	Major
@callstack/repack-plugin-nativewind	Major
@callstack/repack-plugin-reanimated	Major
@callstack/repack-dev-server	Major
@callstack/repack-init	Major

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