Add Parceler and WriteWith

[arkivanov]

This should be placed in the parcelable module.

See the discussion #47.

Here is a tentative implementation from the discussion:

// Parceler.kt in commonMain

expect interface Parceler<T>

// WriteWith.kt in commonMain

@OptIn(ExperimentalMultiplatform::class)
@OptionalExpectation
@Target(AnnotationTarget.TYPE)
expect annotation class WriteWith<P : Parceler<*>>()

// Parceler.kt in androidMain

actual typealias Parceler<T> = kotlinx.parcelize.Parceler<T>

// WriteWith.kt in androidMain

actual typealias WriteWith<P> = kotlinx.parcelize.WriteWith<P>

// Parceler.kt in nonAndroidMain

actual interface Parceler<T>

[arkivanov]

Closed via #52