feat(delete,update,insert): Support build Insert with schema strings.

[xxhZs]

Support build Insert with schema strings. And use query to support update and delete

[slvrtrn]

Adding "partial" insert support with a subset of fields makes sense, as it allows for certain use cases (EPHEMERAL columns, etc).
However, query builder (e.g., for ALTER TABLE statements) should not be part of this crate - it is an abstraction one level above the raw client.
CC @mshustov @serprex @loyd