[client-v2] JSON Support

[chernser]

Description

Client should support JSON Data type (https://clickhouse.com/docs/en/integrations/data-formats/json/overview).

Considerations:

• Client should provide convenient API to get access to row data
• Client should have examples of using a few commonly used JSON parsing libraries
• Client should not implement own JSON parser in any way
• Client documentation should list all details of work with JSON format

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See also:

• https://github.com/ClickHouse/ClickHouse/pull/70288
• https://github.com/Avogar/ClickHouse/blob/master/src/DataTypes/Serializations/SerializationObject.cpp