Upgrade to arrowsquid

[DylanVerstraete]

https://docs.subsquid.io/migrate/migrate-to-arrowsquid/

[sameh-farouk]

Update:
I have been following the process of migrating from version 2 to version 8, but I am finding it to be a bit complex. The migration documentation is not very complete, which has resulted in various errors. While I am working on it alongside other high-priority tasks, progress may be slow.