feat: implement SeederGenerator and CLI commands for automated database seeding and migration generation

New Features

Added optional table selection and documented usage for migration generation.
Added clearer progress and completion messages for migration and seeder generation.
Bug Fixes

Improved validation for table names and chunk options.
Added clearer handling for missing tables, empty databases, connection failures, and file-writing errors.
Existing generated migration files are now replaced instead of duplicated.
Chores

Updated the package version from 2.0.0 to 2.0.1.