Add generic Array / ArrayView abstraction

[chmp]

Introduce a generic Array / ArrayView abstraction that encapsulates the in-memory format in arrow independently from any concrete arrow implementation.

Motivation

Having a small, common abstraction layer makes it simpler to

• Support different concrete arrow implementations (e.g. for Make features additive #52)
• Support different constructors of arrow arrays (serde or manual builders)

Design

Implement an Array / ArrayView Enum with variants for all supported data types. The arrays should be "open" for direct modification to allow construction outside of serde_arrow. The information should be included without redudancy (e.g., no separate length field for the validity bitmap and the overall array).

Store any field metadata that cannot be reconstructed from the array separately (name, nullable, metadata).

Steps

• Serialization for arrow (Add generic Array abstraction #197)
• Deserialization for arrow (Implement ArrayView based Deserialization #200)
• Field / Datatype conversion
• Everything for arrow2
  • Remove From<..> for ArrayDeserializer impls
  • Remove deserialization::construction submodule
• Refactor serializers / deserializes to the generic views / array directly

[chmp]

Finished with #210