Support passing extra parameters

In my case, I want to organize messages by conversation, which means in internal query `getHistory`, I need to change this:

```ts
const allMessages = await context.db.query("messages").collect()
```

to this:

```ts
const allMessages = await context.db
.query("messages")
.withIndex("by_conversation", (q) => q.eq("conversationId", conversationId))
.collect()
```

However, as `useStream` only allow to pass the `streamId`, I can't pass the active `conversationId` to the http route, thus I never get the chance to pass `conversationId` to internal query `getHistory`.

In order to provide more control to the developers, I suggest allow `useStream` to accept more arguments than `streamId` only. Maybe something like this:

```ts
useQuery(getBody, url, true, { streamId, ...rest })
```