Interface
Common
```kotlin
public interface HostDefaultProvider
```
An interface that allows the hosting environment (e.g., Android, Desktop, or iOS) to provide
default values for `CompositionLocal` using `compositionLocalWithHostDefaultOf`.
This acts as a decoupling layer, allowing platform-agnostic libraries to request
platform-specific components ((like `LifecycleOwner` or `ViewModelStoreOwner`) without depending
on platform-specific APIs or artifacts.
## Functions
getHostDefault
```kotlin
public fun getHostDefault(key: HostDefaultKey): T
```
Retrieves a value associated with `key` from the host environment.