Example run environments for all supported languages

[alextac98]

Make an example sandbox so people can play around with the library without needing to install things on their local machines. Ideally, the initial examples come from the same code from the examples directory, so it can be tested in CI

[alextac98]

Some quick digging, there's basically to ways to solve this problem:

Existing Environments

There already exists some environments, namely the ones below, that can be simply embedded into the website. This would be the fastest and easiest to put together, but would not lead to a very unified system.

• Rust: official Rust Playground
• C/C++: Wandbox, Replit, etc.
• Python: Replit, JupyterLite

Self / Hybrid Hosted Runner

This option would mean either self-hosting a remote environment to actually run and compile the code, or using an existing system that's already hosted:

• Judge0 - Open-source code execution API (supports 60+ languages)
• Piston - Fast execution engine API

Of these two, Piston seems to have an API that is free to use and only rate limits to 5 queries per second. Both are open source and can be self-hosted as well.