Creates type recursively excluding functions from given type

ExcludeFunctions.ts

type ExcludeFunctions<T> = {
    // We need to map over the keys directly to preserve optionality. We filter with "as"
    [K in keyof T as T[K] extends Function ? never : K]:
        // Exclude undefined from the check to properly handle optional properties
        Exclude<T[K], undefined> extends Array<infer E>
            ? Array<ExcludeFunctions<E>>
            : Exclude<T[K], undefined> extends Record<string, any>
                ? ExcludeFunctions<T[K]>
                : T[K];