feat(ui): enhance MainWindow with new features and performance

[realybin]

Updated MainWindow.xaml to include a new XML namespace for value converters. Added CacheMode with BitmapCache for improved rendering performance. Enabled ApplyBlurBackground on DialogHost. Modified layout to include Canvas and CustomInkCanvas, and adjusted dialog opening button alignment. Added Snackbar for user feedback and improved ProgressBar binding and visibility handling.

[github-actions]

Summary - Code Coverage

Summary

Generated on:	1/24/2025 - 2:58:17 PM
Coverage date:	1/24/2025 - 2:58:13 PM
Parser:	Cobertura
Assemblies:	1
Classes:	18
Files:	27
Line coverage:	27.9% (114 of 408)
Covered lines:	114
Uncovered lines:	294
Coverable lines:	408
Total lines:	2050
Branch coverage:	20.2% (15 of 74)
Covered branches:	15
Total branches:	74
Method coverage:	Feature is only available for sponsors
Tag:	113_12952027424

Coverage

SketchNow - 27.9%

Name	Line	Branch
SketchNow	27.9%	20.2%
SketchNow.App	0%	0%
SketchNow.Controls.CustomInkCanvas	0%
SketchNow.Controls.IconWithText	0%	0%
SketchNow.Converters.ColorToBrushConverter	0%	0%
SketchNow.Converters.DivisionMathConverter	0%	0%
SketchNow.Converters.EnumToIndexConverter	0%	0%
SketchNow.Input.StylusPlugIns.CustomStylusPlugin	0%
SketchNow.Models.CanvasPage	32.3%	25%
SketchNow.Models.CanvasPages	35.2%
SketchNow.Models.CursorNotFoundException	0%
SketchNow.Models.CustomCursors	100%	50%
SketchNow.Properties.Resource	0%	0%
SketchNow.Properties.Settings	45.4%
SketchNow.ViewModels.MainWindowViewModel	62%	40%
SketchNow.Views.MainWindow	0%	0%
SketchNow.Views.PageNavigationView	0%	0%
SketchNow.Views.SettingsView	0%	0%
SketchNow.Views.ToolBarView	0%	0%