Front stack primary updates and improvements (#757)

* (fix) index.html formating for prettier

* (add) proper icon management
- on-demand icons auto importing
- handle all available icon sets (https://icones.js.org)

* (fix) proper css management

* (add) front stack improvement:
- implement vue router
- prepare for App.vue simplification
- proper management of views and layouts
- fix Tailwind CSS and prepare for overall css cleaning

* (fix) move back user.css to public dir

* (fix) remove user.css import from main.ts

.gitignore

@@ -23,6 +23,7 @@ dist-ssr
 *.njsproj
 *.sln
 *.sw?
+components.d.ts
 
 # Ignore test data.
 tests-ui/data/*