Look what I found:
The extension for VSCode that highlights the syntax of AA+lua mixed scripts.
On github: https://github.com/ken1882/vscode-cea-s ... ghlighting
On MS marketplace: https://marketplace.visualstudio.com/it ... peador.cea
VSCode download: https://code.visualstudio.com/download
Sad that it doesn't highlight lua begin/end pairs. Other lua extensions do.
Also there is no outline support 
This how it looks with mixed AA/lua script (standard Monokai color theme):
