Function describeUnknown

repos/effect/packages/effect/src/ConfigProvider.ts:758–770

(u: unknown)

 * ```ts import.meta.vitest
 * import { Config, ConfigProvider, Effect } from "effect"
 *
 * const provider = ConfigProvider.fromUnknown({
 *   database: {
 *     host: "localhost",
 *     port: 5432
 *   }
 * })
 *
 * const host = Config.string("host").parse(
 *   provider.pipe(ConfigProvider.nested("database"))
 * )
 *
 * Effect.runSync(host) // => "localhost"
 * ```
 *
 * @see {@link fromEnv} – for environment variables