feat: Add Angular, HTML, and SCSS / Sass language servers (#1439)

Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Co-authored-by: Pavlo Basanets <Pavlo_Basanets@epam.com>

docs/02-usage/070_security.md

@@ -142,10 +142,13 @@ Only the language servers listed below download or install additional dependenci
 
 ### npm Package Installs
 
+- **Angular**: `@angular/language-server`, `@angular/language-service`, plus `typescript` and `typescript-language-server`
 - **Ansible**: `@ansible/ansible-language-server`
 - **Bash**: `bash-language-server`
 - **Elm**: `@elm-tooling/elm-language-server`
+- **HTML**: `vscode-langservers-extracted` (provides `vscode-html-language-server`)
 - **PHP (`intelephense`)**: `intelephense`
+- **SCSS / Sass / CSS**: `some-sass-language-server`
 - **Solidity**: `@nomicfoundation/solidity-language-server`
 - **TypeScript**: `typescript` and `typescript-language-server`
 - **Vue**: `@vue/language-server`, plus `typescript` and `typescript-language-server`