## Summary
- Added the primaite/simulator/network/transmission sub-package with modules for each layer. They come together to build a minimal but fairly realistic network Frame.
- A custom PrimaiteHeader has been included to hold primaite specific metadata required in transmission for reward function and RL agent downstream.
- Added some basic tests that check the proper configuration of Frames with matching headers for protocols.
- Updated the frame typehints in NIC and Link classes.
- Added documentation for the transport layer down to data link layer
## Test process
Unit tests check the frame has been configured correctly with the right headers for the right protocol.
## Checklist
- [X] This PR is linked to a **work item**
- [X] I have performed **self-review** of the code
- [X] I have written **tests** for any new functionality added with this PR
- [X] I have updated the **documentation** if this PR changes or adds functionality
- [X] I have written/updated **design docs** if this PR implements new functionality.
- [X] I have run **pre-commit** checks for code style
Related work items: #1724
## Summary
- #1715#1715 - Added Link class in physical_layer.py.- Also added NIC class in physical_layer.py for
#1672. Added attributes and public API functions.
- Added test_physical_layer.py with some basic tests ready to house the tests once logic has been implemented.
- Made use of the pydantic model_post_init function for proper ipv4 configuration checking.
- Added NetworkError to exceptions.py.
- Added timestep int as a param to the apply_timestep function in core.py. Also added a reset_component_for_episode function.
- Updated docs with details of Link and NIC.
## Test process
- Added basic unit tests for instantiation that look at proper config and error raising.
- Added an integration test for linking NICs to Link.
## Checklist
- [ ] This PR is linked to a **work item**
- [ ] I have performed **self-review** of the code
- [ ] I have written **tests** for any new functionality added with this PR
- [ ] I have updated the **documentation** if this PR changes or adds functionality
- [ ] I have run **pre-commit** checks for code style
Related work items: #1672, #1715
## Summary
Added `flake8-annotations` to the pre-commit hooks. This ensures that we all write type hints for all new code.
There's also a minor unrelated addition to the pre-commit template.
## Test process
I tried adding a function with a parameter but no typehint. Git did not allow me to commit this.
## Checklist
- [x] This PR is linked to a **work item**
- [x] I have performed **self-review** of the code
- [x] I have written **tests** for any new functionality added with this PR
- [x] I have updated the **documentation** if this PR changes or adds functionality
- [x] I have run **pre-commit** checks for code style
Related work items: #1721
