fix(core): Wrap JSON de/encoding with UA_ENABLE_JSON_DECODING
fix(core): Wrap JSON de/encoding with UA_ENABLE_JSON_DECODING

JGrothoff/open62541,open62541/open62541,JGrothoff/open62541,open62541/open62541,jpfr/open62541,jpfr/open62541,open62541/open62541,jpfr/open62541,JGrothoff/open62541,JGrothoff/open62541,jpfr/open62541,open62541/open62541