Add script to check block composition

[FrancoGiachetta]

This PR adds a script that checks how many swaps and transfer an average block has. This done through the collection of entrypoints executed during bechmarking a block-range. There are some patterns that pure transfers and swaps share with each other. This plus the fact that the transfer entrypoint seems to have the same hash across different contracts, may make us able to define what makes a transaction to be a transfer.

I also had to organize differently the data about the entrypoint executed that is written in a .json file at the end of benchmark, since before it was just the entrypoints with no separation by block or group of entrypoints.

To be able to run the script first you need to collect some data:

cargo run --release --features benchmark,structured_logging bench-block-range 1046996 1047004 mainnet 1 -o native-data-1046996-1047004-mainnet.json > native-logs-1046996-1047004-mainnet.jsonl

Then you run the script:

python scripts/block_composition.py native-logs-1046996-1047004-mainnet.jsonl

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