Update connections to use latest schema models

[Brayden]

Purpose

This PR is meant to reduce the amount of unused code in the connection and rely more on code that exists already. Also updates how we map database PRAGMA calls to our schema object to make a little more sense. A few other nice to haves outlined below.

Tasks

• Refactor how the Database and Schema object within it exists, now as a Record<string, Table[]>
• Refactor the constructor of MotherDuck to be more consistent with our current connections
• Remove unused properties of MotherDuck such as callback
• Attempts at simplifying some logic
• Merge shared schema names into Database object instead of listing out multiple main schemas for example

Verify

Before

After