[FEATURE]: Add ability to use relations in returning()

[jakeleventhal]

Describe what you want

I want to be able to specify with in a returning clause. For instance:

// Current code
await db.update(users).set({ email }).where(...);
const newUser = await db.query.users.findFirst({ where: ..., with: {settings: true });

// Proposed code
const newUser = await db.update(users).set({ email }).where(...).returning({ with: {settings: true} });