This diff is a part of the flat diffs stack to transform the current Tunnelbroker project into a Rust app by calling the current C++ codebase from Rust. The related transition task is ENG-1072.
This diff introduces creating a Tunnelbroker.h header file which will be exposed and run in Rust main application entry point at main.rs (D5432) which contains an initialization function that calls the initialization functions from the former server.cpp.
Related Linear task: ENG-2092
CI Notice:
The CI will fail on this and further diffs until the D5461 where the changes to CI build commands are made.
This stack will be landed all in one to prevent CI from failing on diffs out of this stack.