Issue description

Summary

Statement.run() and Database.run() currently return undefined, but should return a Changes object to match bun.

The docs are confusing as hell though - since their examples still say they return undefined (they don't)

// Example:

const result = db.run('INSERT INTO users (name) VALUES (?)', ['Alice']);
// => undefined
// Should be: { changes: 1, lastInsertRowid: 1 }

This'll help with showing some more valuable info for db studio.