Enhance init command to detect existing Data/*.sql files and propose trackedTables

[zacateras]

Summary

Update the init command to scan the project directory for existing Data/*.sql files. If such files are found, extract table names and propose a list of initial trackedTables for inclusion in the config file. Prompt the user with the list and ask for confirmation before making changes.

Acceptance Criteria

• init scans for Data/*.sql files in the project directory.
• Extract probable table names from these SQL files.
• Present the user with a proposed list of trackedTables to add to the config.
• Command asks user for confirmation before saving the changes.
• Existing behavior remains unchanged if no Data/*.sql files are found.

Motivation: Streamlines setup for existing projects with SQL files, reducing manual configuration steps.

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Referenced from /create-issue request.