Add PDF export functionality and favicon support

- Introduced a new script for exporting the dashboard as a PDF using html2canvas and jsPDF.
- Added a favicon.ico file and linked it in the base template.
- Updated the base template to include the new PDF export script and modified the button for PDF export functionality.
- Enhanced the index template to include an ID for the dashboard content for PDF generation.

watcher_visio/urls.py

@@ -14,10 +14,13 @@ Including another URLconf
     1. Import the include() function: from django.urls import include, path
     2. Add a URL to urlpatterns:  path('blog/', include('blog.urls'))
 """
+from django.conf import settings
 from django.contrib import admin
 from django.urls import path, include
+from django.views.generic import RedirectView
 
 urlpatterns = [
     path('admin/', admin.site.urls),
+    path('favicon.ico', RedirectView.as_view(url=settings.STATIC_URL + 'favicon.ico', permanent=False)),
     path('', include('dashboard.urls')),
 ]