Added Json instance overload to readJson(inputStream, ...)

[Jolanrensen]

Fixes #459

In the same vein as readCsv/readTsv/readDelim, the overload that takes an InputStream now gains an underlying-library-specific parameter to customize how it parses from the stream. This is an advanced use-case, but it can prevent users having to first manually parse their JSON manually before passing it onto DataFrame.
Since it's an advanced feature, only adding it to the InputStream overload makes sense. If we ever swap out the underlying library, only this function would break.

New example:

DataFrame.readJson(
    stream = myJson.byteInputStream(),
    jsonInstance = Json {
        isLenient = true
        allowTrailingComma = true
        allowComments = true
    },
)

[koperagen]

Hmm, not sure i really like this name. configuration maybe? Maybe reference from other libraries (kotlinx.serialization probably only ever uses it as receiver?)

[koperagen]

Nice!