JSON.parse and JSON.stringify that preserves BigInt values. Works by encoding BigInt values into strings with a special prefix. See https://www.val.town/v/freecrayon/JSONBigInt_example for an example of how to use it.
Useful when working with ZodFormData and you need to parse a text field that contains JSON. See https://www.val.town/v/freecrayon/zodStringToJSON_example for an example of how to use it.