feat: add CockroachDB driver

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Bencher Report

Branch	add-cockroachdb-driver
Testbed	localhost

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Benchmark	Latency	nanoseconds (ns)
postgres-embedded	📈 view plot ⚠️ NO THRESHOLD	825,980,000.00
postgresql-embedded	📈 view plot ⚠️ NO THRESHOLD	831,190,000.00
rusqlite	📈 view plot ⚠️ NO THRESHOLD	4,468,000.00
sqlite	📈 view plot ⚠️ NO THRESHOLD	4,805,400.00

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[codecov[bot]]

Codecov Report

Attention: Patch coverage is 72.72727% with 9 lines in your changes missing coverage. Please review.

Project coverage is 93.50%. Comparing base (131e899) to head (ccc43ea). Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
rsql_drivers/src/cockroachdb/driver.rs	65.38%	9 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #225 +/- ## ========================================== - Coverage 93.79% 93.50% -0.30% ========================================== Files 94 95 +1 Lines 12680 12251 -429 ========================================== - Hits 11893 11455 -438 - Misses 787 796 +9 ```

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