Tracking Issue for Packet Worker re-design

[seanchen1991]

This issue keeps track of all the work that needs to be done as part of the relayer framework re-design:

Issue list: https://github.com/informalsystems/hermes/labels/relayer-next

- [ ] PR that tracks the code changes: #2478 
- [x] https://github.com/informalsystems/hermes/issues/2731
- [ ] https://github.com/informalsystems/hermes/issues/2730
- [ ] https://github.com/informalsystems/hermes/issues/2733
- [ ] https://github.com/informalsystems/hermes/issues/2732
- [x] #2597
- [x] #2598
- [ ] Guide for context-generic programming: https://github.com/informalsystems/context-generic-programming
- [ ] PR that tracks code documentation 
- [ ] PR that tracks testing 

[soareschen]

Closing this as we will track it through the relayer-next label