895343: Replaced Blazor TextBox code instead of CSS component

[UdhayaKumarDuraisamy]

UG documentation 898985: Need to use Blazor TextBox instead of CSS component

Previously, a CSS component was used to demonstrate how to add an icon to a TextBox component. Now, I have replaced it with Blazor TextBox using Razor and C# code.

[SyncfusionBuild]

Build Status: INPROGRESS 🔃
Build Location: BLAZ-895343-Hot

[SyncfusionBuild]

CI Status: SUCCESS ✅
Source Compilation: SUCCESS ✅
Build Location: BLAZ-895343-Hot
Technical Error(s): 0
Spelling Error(s): 0
Image Alt Text Error(s): 0
Image Size Error(s): 0
Image Name Error(s): 0
FT Layout Syntax Error(s): 0
Front matter Error(s): 0
File Path Error(s): 0
CodeSnippet File Path Missing Error(s): 0
Toc Anchor Tags Validation Error(s): 0