feat: add schemas command and driver schema metadata

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Bencher

Report	Sat, July 6, 2024 at 23:17:52 UTC
Project	theseus-rs/rsql
Branch	add-schemas-command
Testbed	localhost

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Benchmark	Latency	Latency Results nanoseconds (ns)
duckdb	➖ (view plot)	7,609,500.00
postgres-embedded	➖ (view plot)	807,610,000.00
postgresql-embedded	➖ (view plot)	800,080,000.00
rusqlite	➖ (view plot)	3,547,700.00
sqlite	➖ (view plot)	3,842,300.00

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Codecov Report

Attention: Patch coverage is 97.87234% with 6 lines in your changes missing coverage. Please review.

Project coverage is 94.84%. Comparing base (05dffbe) to head (be5a022).

Files	Patch %	Lines
rsql_drivers/src/duckdb/metadata.rs	96.29%	1 Missing :warning:
rsql_drivers/src/metadata.rs	96.96%	1 Missing :warning:
rsql_drivers/src/mysql/metadata.rs	96.87%	1 Missing :warning:
rsql_drivers/src/postgresql/metadata.rs	96.96%	1 Missing :warning:
rsql_drivers/src/sqlite/metadata.rs	96.00%	1 Missing :warning:
rsql_drivers/src/sqlserver/metadata.rs	96.96%	1 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #166 +/- ## ========================================== + Coverage 94.81% 94.84% +0.02% ========================================== Files 93 94 +1 Lines 10885 11039 +154 ========================================== + Hits 10321 10470 +149 - Misses 564 569 +5 ```

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