feat(marshal): smartUnmarshalRaw1 to handle raw query single return result including THROW statement errors

[agufagit]

current SmartUnmarshal only handles array return results, doesn't handle other return types such as create only user which returns an object.

the new SmartUnmarshalRaw1 only handles raw query, and only handles single return result: [map[result:true status:OK time:4.219606ms]]

This is required because of custom functions DEFINE FUNCTION fn::xxx and BEGIN;...COMMIT; block doesn't return arrays, and only returns single result.

it also handles THROW statement errors BEGIN; THROW 'blocked'; COMMIT; : [map[result:An error occurred: blocked status:ERR time:4.219606ms]]

this function should cover 99% of people's needs

tested against surrealdb v1.0.0

[ElecTwix]

Thanks for the PR @agufagit,
I was working on my project and I faced similar problems with current driver.
It can be good to add something like this as a helper function.

@phughk , @timpratim what do you think?

[ElecTwix]

Looks good overall,
did some nitpicks.

[phughk]

We are very likely to change direction with the API. Until then, approving this, but please consider that it might not live long as available functionality.