Gather adopters and use cases

[utam0k]

Collect information from existing users for future development and reference. The information collected here will eventually be included in the documentation.

The necessary information:

• project name and link
• project summary(1 line)
• crates being used(optional)

[ichAB]

project name: rk8s (https://github.com/rk8s-dev/rk8s)
summary: A lightweight Kubernetes-compatible container orchestration system written in Rust, implementing the Container Runtime Interface (CRI) with support for single containers, Kubernetes-style pods, and Docker Compose-style multi-container applications.

[jprendes]

Project name: runwasi (https://github.com/containerd/runwasi/)
Summary: A containerd shim to run WebAssembly containers in docker and k8s.
Cates used: libcontainer, used to build the OCI compatible sandbox for executing wasm, and used for running native containers in the same pod (e.g., sidecars)

Project name: spinkube (https://www.spinkube.dev/)
Summary: A containerd shim to run Spin applications in k8s (serverless)
Crates: libcontainer, through runwasi