Add polyfill for newly available `Set` methods

[mattcosta7]

when using typescript es2024 Set method types are available, but Safari 16.4 still doesn't support them (they're baselines newly available). we shouldpolyfill and remove once they fall off support

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Set/intersection
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Set/difference
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Set/isDisjointFrom
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Set/isSubsetOf
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Set/isSupersetOf
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Set/symmetricDifference
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Set/union