Waku message size analysis

[Daimakaimura]

At the moment there is a lack of analytics that take into account correlations with the size of the messages being passed through the Waku network. This is part because we didn't have the messages sizes included in the Waku logs, This is not the case anymore. This issue should include the following aspects in the Analysis module of Wakurtosis:

• Parse the message sizes from the Waku logs
• Generate correlation data and plot that show the relationship between message size and other metrics such as propagation times