[Feature]: Token balances subscription

[rsodre]

Feature Request

Provide a way to subscribe to new and changed token balances.

Depends on dojo#2819

Proposed Solution

Add a function to the SDK package that subscribes to Torii token balances.

Alternatives

Fetching all tokens periodically to apply changes, which is expensive.

Related Code

This is how we fetch tokens. The subscription should return the same data:

https://github.com/dojoengine/dojo.js/blob/main/packages/sdk/src/index.ts#L192-L200

Additional context

No response

If the feature is accepted, would you be willing to contribute it?

• Yes I would be willing to contribute