SfNumericEntry (MAUI): Update SelectAllOnFocus UG in Basic-Features.md hotfix

[NatarajanSF4844]

Summary

• Modifies the “Select text on focus” section to document SelectAllOnFocus for .NET MAUI SfNumericEntry.

What’s included

• Updated header and description to reference SfNumericEntry.
• XAML and C# examples using SfNumericEntry.
• Clarified default behavior and usage guidance.

Files changed

• docs/maui/numeric-entry/Basic-Features.md (updated “Select text on focus” section)

API impact

• New/Changed APIs: SfNumericEntry.SelectAllOnFocus (bool), default: true
• Backward compatibility: No breaking changes
• Obsolete/Removed: None

Screenshots

• N/A (no image changes required). Add screenshot if desired in a follow-up.

[SyncfusionBuild]

Build Status: INPROGRESS 🔃
Build Location: SelectAllOnFocusUGHf

[SyncfusionBuild]

CI Status: SUCCESS ✅
Source Compilation: SUCCESS ✅
Build Location: SelectAllOnFocusUGHf
Technical Error(s): 0
Spelling Error(s): 0
Image Alt Text Error(s): 0
Image Size Error(s): 0
Image Name 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
MD Tag Validation Error(s): 0