Warn about large ints in JSON

[mariano54]

JSON parsers might not support large ints, we do use very large integers in the RPC in some cases.

[KryptomineCH]

the usual type would belong/ulong in c# terms.

Specifically there are 3 routes which use BigInt:

• BlockchainState (network space)
• GetNetworkSpace
• GetAllPuzzleHashes

you can either make a custom converter function for that field or use a chia library which should have this functionality included.
https://www.nuget.org/packages/CHIA-RPC/ and the corresponding Chia-Client-Library (c#) for instance handles BigInt values.