SNOW-1256917 Implement structured maps

[sfc-gh-pfus]

Description

SNOW-1256917 Implemented structured maps

Checklist

• [ ] Created tests which fail without the change (if possible)
• [ ] Extended the README / documentation, if necessary

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 0% with 243 lines in your changes are missing coverage. Please review.

Project coverage is 79.22%. Comparing base (ad5a505) to head (53b49d3).

Files	Patch %	Lines
converter.go	0.00%	243 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #1089 +/- ## ========================================== - Coverage 80.95% 79.22% -1.73% ========================================== Files 52 52 Lines 10444 10669 +225 ========================================== - Hits 8455 8453 -2 - Misses 1989 2216 +227 ```

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