envio dev doesn't recognise changes to imported files to the event handlers

[DenhamPreen]

Describe the bug
When running envio dev the state diff code doesn't recognise changes to files that are imported into the eventHandler.* file

To Reproduce
Steps to reproduce the behavior:

1. Create an indexer
2. Write a function in a seperate file outside of eventhandler.*
3. Import that function into a handler
4. Run `envio dev
5. Make changes to the seperate file
6. Run envio dev - you'll notice that it doesn't start re-indexing

Expected behavior
Use esbuild to reliably identify changes to the full/relevant import tree in eventhandler files

Additional context
This PR implemented the solution however became stagnant as the creator changed with the repo migration