Add blockchain database APIs to JSON_RPC_API.md file

[platfowner]

Change summary:

• Add ain_matchFunction, ain_matchRule, ain_matchOwner APIs
• Add ain_evalRule, ain_evalOwner APIs
• Add ain_getStateProof, ain_getProofHash APIs
• Add ain_getStateInfo API
• Add ain_getStateUsage API

Related issues:

• https://github.com/ainblockchain/ain-blockchain/issues/1235

[platfowner]

Thanks for the review! @jiyoung-an Now merging..