Use zod to validate config

[forgetso]

See examples in provider/src/types/captcha.ts

export const DatasetSchema = z.object({
    datasetId: z.string().optional(),
    captchas: CaptchasSchema,
    format: z.nativeEnum(CaptchaTypes),
    tree: z.array(z.array(z.string())).optional()
})

and then apply zod parsing within getConfig to ensure config is valid.

    private static getConfig (): ProsopoConfig {
        const filePath = Environment.getConfigPath()
        return Environment.importCsjOrEsModule(filePath)
    }