devcontainer for easier development setup

[zerotacg]

vscode, clion and I'd assume other IDEs as well support devcontainer. So I'd like to contribute to get people up and running with as little steps as possible. the devcontainer is based on the azure pipeline. I also added a configuration to run the web portion of the project.

• https://code.visualstudio.com/docs/devcontainers/containers
• https://www.jetbrains.com/help/clion/connect-to-devcontainer.html
• https://www.jetbrains.com/help/clion/clion-toolchains-in-docker.html

[nimetu]

You using main/yubo-dev branch.

Changes to live game branches should be in https://gitlab.com/ryzom/ryzom-core/ and against main/atys-live branch

If you want to contribute your changes in github, then you should use core4 as your target branch and not merge with live branches like main/atys-live or main/yubo-dev

[zerotacg]

it wasn't clear which platform to use. I prefere gitlab anyhow so I'll make hte merge request there.