ResamplerConfig

Language-independent config for an rtemis resampler. Mirrors the `ResamplerConfig` object: a resampler type plus its type-specific settings. The same config drives rtemis (R), rtemis CLI/shell, and rtemislive to identical resamples. `type` selects the variant and its settings are siblings of it, validated against the variant's own schema below. Anything not set takes rtemis's default, so an object holding only `type` is that variant with every default.