Add wasm-language-tools to Advanced Tools page (#534)

Adding wasm-language-tools to Advanced Tools page should make sense
because that page is related to WebAssembly Text Format.

Author: g-plane

getting-started/advanced-tools.md

@@ -79,3 +79,17 @@ asm.js and LLVM .s files into WebAssembly and so on.
 
 Tool developers are highly encouraged to explore the full set of functionality
 implemented by binaryen.
+
+## wasm-language-tools
+
+[wasm-language-tools](https://github.com/g-plane/wasm-language-tools) contains a
+language server that can provide and improve the editing experience of
+WebAssembly Text Format. It delivers deep and smart static analysis, precise
+type checking, and full-featured editor integration — plus a configurable
+formatter. Common editors like VS Code, Zed, Neovim, Emacs, and Helix are
+supported.
+
+It supports a variety of Language Server Protocol features, from code completion
+and go to definition to inlay hint and call hierarchy. For diagnostics, not only
+type checking and other basic validations, but it can also catch unused items,
+unreachable code, mutation detection and other potential issues.