monaco_editor: support SQL Methods

use syntax highlighting for SQL language, not really correct because of
dtml, but probably better than plain text

bt5/erp5_monaco_editor/SkinTemplateItem/portal_skins/erp5_monaco_editor/monaco-editor.gadget.js.js

@@ -94,6 +94,8 @@
         model_language = 'javascript';
       } else if (options.portal_type === 'Web Style') {
         model_language = 'css';
+      } else if (options.portal_type === 'SQL Method') {
+        model_language = 'sql';
       } else if (
         options.portal_type === 'Python Script' ||
         options.portal_type === 'Workflow Script' ||