Add Yaml Naming Strategies

[russellbanks]

Describe the problem you'd like to solve

There is no naming strategy implementation, so @SerialName has to be applied to every variable in a data class:

@SerialName("PackageIdentifier") val packageIdentifier: String,
@SerialName("PackageVersion") val packageVersion: String

Describe the solution you'd like

A YamlNamingStrategy in the YamlConfiguration.

configuration = YamlConfiguration(
    yamlNamingStrategy = YamlNamingStrategy.PascalCase // CamelCase, SnakeCase, etc
)

Describe alternatives you've considered

@SerialName on every variable

Additional context

KotlinX Serialization recently added Json naming strategies in 1.5.0:

A long-awaited feature (Kotlin/kotlinx.serialization#33) is available in this release.
A new interface, JsonNamingStrategy and Json configuration property namingStrategy allow defining a transformation that is applied to all properties' names serialized by a Json instance.
There's also a predefined implementation for the most common use case: Json { namingStrategy = JsonNamingStrategy.SnakeCase }.
Check out the Kotlin/kotlinx.serialization#2111 for more details and documentation.

Json {
    namingStrategy = JsonNamingStrategy.SnakeCase // Predefined
}

Json {
    namingStrategy = JsonNamingStrategy { descriptor: SerialDescriptor, elementIndex: Int, serialName: String ->
        // Able to define custom naming strategy
    }
}

https://kotlinlang.org/api/kotlinx.serialization/kotlinx-serialization-json/kotlinx.serialization.json/-json-naming-strategy

[charleskorn]

I don't have time to work on this myself, but I'd gladly review a PR for this if you're interested in putting one together.

[stale]

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