Imports of insert command

PathSynopsis
contextPackage context defines the Context type, which carries deadlines, cancellation signals, and other request-scoped values across API boundaries and between processes.
github.com/ClickHouse/ch-goPackage ch implements ClickHouse client.
github.com/ClickHouse/ch-go/protoPackage proto implements ClickHouse wire protocol.
ioPackage io provides basic interfaces to I/O primitives.
timePackage time provides functionality for measuring and displaying time.