Add an helper to map and encode list/array/seq

[MangelMaxime]

Currently, when you want to encode a list, array, seq, etc. this is the user responsibility to map its value into a JSON array.

values
|> List.map TKProOrderStatus.encoder
|> Encode.list

If Encode.list was to accept an encoder as argument then we could move that responsibility inside of Thoth.Json.Core API.

module Encode =

    let mapList encoder values = 
        values
        |> List.map encoder
        |> List.toArray
        |> Json.Array

Encode.mapList TeamMemberId.encoder values

Note: Check if it is possible to change the Encode.list itself and still supports mixed types.

Example:

Encode.list [
    Encode.string "InvalidLogin"
    Encode.int 0
]

I don't think it will be possible or it would add indirection in the code as the user would need to use a DUs to represents the different cases.