Add UI for configuring toggles

[osipxd]

Currently, the library has UI implemented as a plugin for RedMadRobot/debug-panel-android. It would be great to be able to use this UI separately from the debug-panel. For example, add it to own implementation of debug panel.

All we need to do is to provide API like this:

@Composable
fun KonfeatureConfigurationScreen(
    konfeature: Konfeature,
    settingInterceptor: KonfeatureSettingsInterceptor = /* retrieve the interceptor from the given Konfeature instance */
    modifier: Modifier = Modifier,
)

interface KonfeatureSettingsInterceptor : Interceptor {
    val valuesFlow: StateFlow<Map<String, Any>>

    suspend fun setValue(key: String, value: Any)
    suspend fun resetValue(key: String)
    suspend fun resetAllValues()
}

Where KonfeatureSettingsInterceptor is the entity responsible for changing settings from UI and, probably, storing the changes somewhere.