refactor!: create database metadata

[github-actions[bot]]

Bencher

Report	Tue, April 16, 2024 at 01:32:57 UTC
Project	theseus-rs/rsql
Branch	database-metadata
Testbed	localhost

Benchmark	Latency	Latency Results nanoseconds (ns)
duckdb	➖ (view plot)	3932000.000
postgres-embedded	➖ (view plot)	823170000.000
postgresql-embedded	➖ (view plot)	822980000.000
rusqlite	➖ (view plot)	265660.000
sqlite	➖ (view plot)	500830.000

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[codecov[bot]]

Codecov Report

Attention: Patch coverage is 98.00222% with 18 lines in your changes are missing coverage. Please review.

Project coverage is 95.94%. Comparing base (4687057) to head (f266f28).

Files	Patch %	Lines
rsql_drivers/src/connection.rs	0.00%	3 Missing :warning:
rsql_drivers/src/duckdb/metadata.rs	97.91%	2 Missing :warning:
rsql_drivers/src/mysql/metadata.rs	98.00%	2 Missing :warning:
rsql_drivers/src/postgres/metadata.rs	98.05%	2 Missing :warning:
rsql_drivers/src/postgresql/metadata.rs	98.05%	2 Missing :warning:
rsql_drivers/src/rusqlite/metadata.rs	97.82%	2 Missing :warning:
rsql_drivers/src/sqlite/metadata.rs	97.82%	2 Missing :warning:
rsql_drivers/src/sqlserver/metadata.rs	98.00%	2 Missing :warning:
rsql_core/src/commands/indexes.rs	97.29%	1 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #121 +/- ## ========================================== + Coverage 95.89% 95.94% +0.04% ========================================== Files 79 87 +8 Lines 9144 9572 +428 ========================================== + Hits 8769 9184 +415 - Misses 375 388 +13 ```

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