Disable declarations folder generation until addon source code converted to TypeScript

Author: SergeAstapov

rollup.config.mjs

@@ -48,8 +48,9 @@ export default {
     // Ensure that .gjs files are properly integrated as Javascript
     addon.gjs(),
 
-    // Emit .d.ts declaration files
-    addon.declarations('declarations'),
+    // @todo convert addon to TypeScript
+    // // Emit .d.ts declaration files
+    // addon.declarations('declarations'),
 
     // addons are allowed to contain imports of .css files, which we want rollup
     // to leave alone and keep in the published output.