Add support for TCP and UDP protocols in simulation configuration

[kamilsa]

• Introduced Protocol enum in SimulationConfig to specify TCP or UDP.
• Updated YAML configuration files to include protocol settings.
• Modified simulator to handle protocol selection and socket creation accordingly.

[Copilot]

Pull Request Overview

This PR adds support for TCP and UDP protocols in the simulation configuration by introducing a new Protocol enum and updating related configuration and simulator logic.

• Introduced a new Protocol enum in both the simulator and configuration.
• Updated YAML configuration files and CLI flags to include protocol settings.
• Modified the simulator’s socket creation, connection, and message-sending logic based on the selected protocol.

Reviewed Changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
test_udp.yaml	New UDP configuration for simulation tests.
test_tcp.yaml	New TCP configuration for simulation tests.
src/beamsim/ns3/simulator.hpp	Added Protocol enum and updated socket handling based on protocol.
main.cpp	Configured the simulator to set protocol based on SimulationConfig.
example.yaml	Updated example to include protocol settings.
cli.hpp	Extended SimulationConfig with Protocol enum and CLI flag.

Comments suppressed due to low confidence (1)

src/beamsim/ns3/simulator.hpp:385

• [nitpick] Consider renaming 'tcp_listener_' to a more generic name (e.g., 'listener_') since it is used for both TCP and UDP protocols.

      tcp_listener_ = makeSocket();