doc: update README

Signed-off-by: Tianyang Zhang <burning9699@gmail.com>

README.md

@@ -18,6 +18,20 @@
 
 Kuasar is an efficient container runtime that provides cloud-native, all-scenario container solutions by supporting multiple sandbox techniques. Written in Rust, it offers a standard sandbox abstraction based on the sandbox API. Additionally, Kuasar provides an optimized framework to accelerate container startup and reduce unnecessary overheads.
 
+# Supported Sandboxes
+
+| Sandboxer      | Sandbox          | Status             |
+|----------------|------------------|--------------------|
+| **MicroVM**    | Cloud Hypervisor | Supported          |
+|                | QEMU             | Supported          |
+|                | StratoVirt       | Supported          |
+|                | Firecracker      | Planned in 2024    |
+| **App Kernel** | Quark            | Supported          |
+|                | gVisor           | Planned in 2024    |
+| **Wasm**       | WasmEdge         | Supported          |
+|                | Wasmtime         | Supported          |
+| **runC**       | runC             | Planned in 2023 H2 |
+
 # Why Kuasar?
 
 In the container world, a sandbox is a technique used to separate container processes from each other, and from the operating system itself. After the introduction of the [Sandbox API](https://github.com/containerd/containerd/issues/4131), sandbox has become the first-class citizen in containerd. With more and more sandbox techniques available in the container world, a management service called "sandboxer" is expected to be proposed.