Depends on #17798

• The tokens data are currently stored in the (root) key :wallet/tokens and it needs to be moved under the :wallet key (along with the accounts and other data). The :token key (under wallet) will be a map which will contain the data and loading? keys.
• The keys inside the token data need to be renamed (kebab-case) and the helper methods should be placed in status-im2.common.data-store.wallet ns.
• The subscriptions need to be updated to attach the token data for each account along with the account data.
• The helper methods for the calculation of balances should be moved to status-im2.contexts.wallet.common.utils ns.
• The usage should be updated across the wallet.

Acceptance Criteria

The app should work as before