chore: migrate gulp build devextreme-scss task to nx

.github/workflows/themebuilder_tests.yml

@@ -52,7 +52,7 @@ jobs:
 
     - name: Build etalon bundles
       working-directory: ./packages/devextreme-scss
-      run: pnpm exec gulp style-compiler-themes-ci
+      run: pnpm nx build:ci devextreme-scss
 
     - name: Build
       working-directory: ./packages/devextreme-themebuilder

packages/devextreme-scss/package.json

@@ -3,27 +3,17 @@
   "type": "module",
   "devDependencies": {
     "clean-css": "5.3.3",
-    "del": "2.2.2",
-    "gulp": "4.0.2",
-    "gulp-autoprefixer": "10.0.0",
-    "gulp-cache": "1.1.3",
-    "gulp-plumber": "1.2.1",
-    "gulp-replace": "0.6.1",
-    "gulp-sass": "6.0.1",
-    "gulp-shell": "0.8.0",
-    "minimist": "1.2.8",
     "sass-embedded": "1.93.3",
     "stylelint": "15.11.0",
     "stylelint-config-standard-scss": "9.0.0",
     "stylelint-scss": "6.10.0",
-    "through2": "2.0.5",
     "ts-jest": "29.1.2"
   },
   "scripts": {
-    "build": "gulp",
+    "build": "pnpm nx build devextreme-scss",
     "lint": "stylelint scss/widgets",
     "test": "jest --no-coverage --runInBand --config=./tests/jest.config.json",
-    "watch": "gulp watch"
+    "watch": "pnpm nx run devextreme-scss --target=watch"
   },
   "version": "26.1.2"
 }