980754: Revise UG Documentation Content for Blazor Platform (Section-2)

[Sridhar-Karunakaran]

Description
Enhance the content of the following sections in the Blazor UG documentation:

1. Apply custom style to pivot cells in Blazor Pivot Table Component
2. Convert complex data to flat data and assign it to the Pivot Table
3. Customize number and date format in Blazor Pivot Table Component
4. Customizing loading indicator in Blazor Pivot Table Component
5. Display string values in Blazor Pivot Table value cells
6. Hide empty headers in Blazor Pivot Table Component
7. Switching to older themes style in Blazor Pivot Table Component
8. Tooltip in Blazor Pivot Table Component

[SyncfusionBuild]

Build Status: INQUEUE 🕒
Build Location: EJ2-980754-Dev

[SyncfusionBuild]

Build Status: INPROGRESS 🔃
Build Location: EJ2-980754-Dev

[SyncfusionBuild]

CI Status: FAILURE ❌
Source Compilation: SUCCESS ✅
Failure Reason: CI Failure with violation
Build Location: EJ2-980754-Dev
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): 1
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

[SyncfusionBuild]

Build Status: INPROGRESS 🔃
Build Location: EJ2-980754-Dev

[SyncfusionBuild]

CI Status: SUCCESS ✅
Source Compilation: SUCCESS ✅
Build Location: EJ2-980754-Dev
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

[SyncfusionBuild]

Build Status: INPROGRESS 🔃
Build Location: EJ2-980754-Dev

[SyncfusionBuild]

CI Status: SUCCESS ✅
Source Compilation: SUCCESS ✅
Build Location: EJ2-980754-Dev
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