Use lightningcss to process CSS (#5485)

* Use lightningcss to process CSS

* Shorten prefix

* Add local to name as hash is the file hash

* CI?

* Process css in test env

Author: OEvgeny

package-lock.json

@@ -208,6 +208,7 @@
     "tsup": "^8.3.6",
     "typescript": "^5.7.3",
     "typescript-plugin-css-modules": "^5.1.0",
+    "unplugin-lightningcss": "^0.4.1",
     "xmlbuilder": "^15.1.1"
   },
   "dependencies": {

package.json

@@ -38,7 +38,7 @@ const config: typeof baseConfig = {
     SPEECH_CONDUCT_OCSP_CHECK: '',
     SPEECH_OCSP_CACHE_ROOT: ''
   },
-  esbuildPlugins: [...(baseConfig.esbuildPlugins || []), resolveCognitiveServicesToES2015],
+  esbuildPlugins: [resolveCognitiveServicesToES2015],
   noExternal: [
     '@babel/runtime',
     'memoize-one',