Bug Report: Incompatibility with OkHttp 5.x – NoClassDefFoundError: okhttp3.internal.Util

### 👟 Reproduction steps

1. Add `implementation("com.squareup.okhttp3:okhttp:5.1.0")` to dependencies
2. Use Appwrite SDK in your Android app
3. Run a request that uses cookies
4. Crash occurs at `ListenableCookieJar`

### 👍 Expected behavior

- The Appwrite SDK should not rely on internal or private OkHttp classes.
- `ListenableCookieJar` should use only public APIs (e.g. `java.net.HttpCookie.parse(...)`) to handle cookies.
- App should work normally without crashing when using OkHttp 5.x.

### 👎 Actual Behavior

- App crashes at runtime with the following error:
- Caused by internal API usage that was removed in OkHttp 5.1.0.
- Makes it impossible to use Appwrite SDK with the latest OkHttp versions.

### 🎲 Appwrite version

Appwrite Cloud

### 💻 Operating system

Something else

### 🧱 Your Environment

- Appwrite SDK version: 8.1.0
- OkHttp version: 5.1.0
- Android version: Any
- Crash location: `ListenableCookieJar.kt`

### 👀 Have you spent some time to check if this issue has been raised before?

- [x] I checked and didn't find similar issue

### 🏢 Have you read the Code of Conduct?

- [x] I have read the [Code of Conduct](https://github.com/appwrite/.github/blob/main/CODE_OF_CONDUCT.md)