feat: basic autocomplete of table names where metadata is available. …

[gazure]

Describe the pull request

First pass at implementing a sql completer specified by #188

added a setting to enable/disable new completions.

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 95.60853% with 35 lines in your changes missing coverage. Please review.

Project coverage is 93.81%. Comparing base (78477a7) to head (6d8683b). Report is 22 commits behind head on main.

Files with missing lines	Patch %	Lines
rsql_core/src/shell/completer.rs	95.37%	23 Missing :warning:
rsql_drivers/src/metadata.rs	80.95%	8 Missing :warning:
rsql_drivers/src/connection.rs	95.23%	2 Missing :warning:
rsql_core/src/shell/repl.rs	93.75%	1 Missing :warning:
rsql_drivers/src/snowflake/driver.rs	0.00%	1 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #193 +/- ## ========================================== + Coverage 93.30% 93.81% +0.51% ========================================== Files 93 94 +1 Lines 11912 12678 +766 ========================================== + Hits 11114 11894 +780 + Misses 798 784 -14 ```

:umbrella: View full report in Codecov by Sentry.
:loudspeaker: Have feedback on the report? Share it here.

[brianheineman]

Thanks for the PR! 🎉

[gazure]

🎉