Update document to add wamr-rust-sdk introduction (bytecodealliance#3204)

Merge branch dev/rust_sdk to main.
The wamr-rust-sdk has been migrated to the standalone repo:
  https://github.com/bytecodealliance/wamr-rust-sdk
So here we just update the document to add the introduction.

Author: wenyongh

README.md

@@ -35,7 +35,7 @@ WebAssembly Micro Runtime (WAMR) is a lightweight standalone WebAssembly (Wasm)
 - [XIP (Execution In Place) support](./doc/xip.md), ref to [document](./doc/xip.md)
 - [Berkeley/Posix Socket support](./doc/socket_api.md), ref to [document](./doc/socket_api.md) and [sample](./samples/socket-api)
 - [Multi-tier JIT](./product-mini#linux) and [Running mode control](https://bytecodealliance.github.io/wamr.dev/blog/introduction-to-wamr-running-modes/)
-- Language bindings: [Go](./language-bindings/go/README.md), [Python](./language-bindings/python/README.md)
+- Language bindings: [Go](./language-bindings/go/README.md), [Python](./language-bindings/python/README.md), [Rust](./language-bindings/rust/README.md)
 
 ### Wasm post-MVP features
 - [wasm-c-api](https://github.com/WebAssembly/wasm-c-api), ref to [document](doc/wasm_c_api.md) and [sample](samples/wasm-c-api)
@@ -46,14 +46,14 @@ WebAssembly Micro Runtime (WAMR) is a lightweight standalone WebAssembly (Wasm)
 - [Multi-value](https://github.com/WebAssembly/multi-value), [Tail-call](https://github.com/WebAssembly/tail-call), [Shared memory](https://github.com/WebAssembly/threads/blob/main/proposals/threads/Overview.md#shared-linear-memory)
 
 ### Supported architectures and platforms
-The WAMR VMcore supports the following architectures:  
+The WAMR VMcore supports the following architectures:
 - X86-64, X86-32
 - ARM, THUMB (ARMV7 Cortex-M7 and Cortex-A15 are tested)
 - AArch64 (Cortex-A57 and Cortex-A53 are tested)
 - RISCV64, RISCV32 (RISC-V LP64 and RISC-V LP64D are tested)
 - XTENSA, MIPS, ARC
 
-The following platforms are supported, click each link below for how to build iwasm on that platform. Refer to [WAMR porting guide](./doc/port_wamr.md) for how to port WAMR to a new platform.  
+The following platforms are supported, click each link below for how to build iwasm on that platform. Refer to [WAMR porting guide](./doc/port_wamr.md) for how to port WAMR to a new platform.
 - [Linux](./product-mini/README.md#linux),  [Linux SGX (Intel Software Guard Extension)](./doc/linux_sgx.md),  [MacOS](./product-mini/README.md#macos),  [Android](./product-mini/README.md#android), [Windows](./product-mini/README.md#windows), [Windows (MinGW)](./product-mini/README.md#mingw)
 - [Zephyr](./product-mini/README.md#zephyr),  [AliOS-Things](./product-mini/README.md#alios-things),  [VxWorks](./product-mini/README.md#vxworks), [NuttX](./product-mini/README.md#nuttx), [RT-Thread](./product-mini/README.md#RT-Thread), [ESP-IDF](./product-mini/README.md#esp-idf)
 
@@ -67,7 +67,7 @@ The following platforms are supported, click each link below for how to build iw
 - [Build Wasm applications](./doc/build_wasm_app.md)
 - [Port WAMR to a new platform](./doc/port_wamr.md)
 - [VS Code development container](./doc/devcontainer.md)
-- [Samples](./samples) and [Benchmarks](./tests/benchmarks) 
+- [Samples](./samples) and [Benchmarks](./tests/benchmarks)
 
 
 

language-bindings/rust/README.md

@@ -0,0 +1 @@
+We use a separate repository to host the WAMR Rust SDK. Please refer to [WAMR Rust SDK](https://github.com/bytecodealliance/wamr-rust-sdk) for more details.