FIFO fair semaphore implementation

[ZelboK]

Addresses #450 with the proposal of a ticket lock system and a potential implementation. This work is not complete and I am looking to get feedback early.

I also changed the devcontainer.json a bit because if you do which clangd the location is not where it is specified to be in the json file. I can now get clangd to work with devcontainers.

cc @miscco @jrhemstad @bernhardmgruber @gonzalobg