* feat: add native balance in StorageChanges
This will be used by the next update of DCI to properly track native balance for all the contract that it's indexing. Also added a performance optimization, we now ignore slot updates if the value after the transaction is the same than before.
* docs: add docs on how to generate test assets
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Co-authored-by: zizou <111426680+flopell@users.noreply.github.com>
