docs(demo): Add @slateui/theme package in demo app

Author: immohammadjaved

package-lock.json

@@ -31,6 +31,7 @@
     "@angular/platform-server": "^20.0.0",
     "@angular/router": "^20.0.0",
     "@angular/ssr": "^20.1.4",
+    "@slateui/theme": "^1.0.0",
     "@tailwindcss/postcss": "^4.1.11",
     "express": "^5.1.0",
     "postcss": "^8.5.6",
@@ -54,4 +55,4 @@
     "ng-packagr": "^20.1.0",
     "typescript": "~5.8.2"
   }
-}
+}

package.json

@@ -2,7 +2,7 @@ import { ApplicationConfig, provideBrowserGlobalErrorListeners, provideZonelessC
 import { provideRouter } from '@angular/router';
 
 import { routes } from './app.routes';
-import { provideSlateUiTheme } from 'theme';
+import { provideSlateUiTheme } from '@slateui/theme';
 import { provideClientHydration, withEventReplay } from '@angular/platform-browser';
 
 export const appConfig: ApplicationConfig = {

projects/demo/src/app/app.config.ts

@@ -1,5 +1,5 @@
 import { Component, inject } from '@angular/core';
-import { ThemeService } from 'theme';
+import { ThemeService } from '@slateui/theme';
 
 @Component({
   selector: 'app-root',