bug(1035962): Enhance documentation on accessing TreeGrid public methods for word count

[Sreedharkumar-Panarapu]

Updated the documentation to clarify how to access public methods in the Blazor TreeGrid component, including best practices and common methods.

Description

Updated the words count and added some more content

Code Studio usage(Mandatory)

• Code Studio used in this PR/MR?

  • Yes
  • No

• If Yes: Primary use (choose one)

  • Generate new content
  • Refactor/improve existing content
  • Review assistance (explanations/summaries)
  • Other:

• Outcome

  • Saved time
  • Neutral
  • Cost time

• If “Cost time” explain in short (1 or 2 lines):

Type of Change

• New documentation page
• Update to existing documentation
• Bug fix (broken links, typos, formatting issues)
• Structural change (folders, navigation, index)
• Content improvement (clarity, examples, screenshots)
• Other (please describe):

Reviewer Checklist (Mandatory)

• Reviewed the provided Code Studio usages related information
• Content changes follow UG/Documentation guidelines
• All provided information reviewed and verified
• Links and previews checked

[SyncfusionBuild]

Build Status: INPROGRESS 🔃
Build Location: 1035962-wordscount

[SyncfusionBuild]

CI Status: FAILURE ❌
Source Compilation: SUCCESS ✅
Failure Reason: CI Failure with violation
Build Location: 1035962-wordscount
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): 1

[SyncfusionBuild]

Build Status: INPROGRESS 🔃
Build Location: 1035962-wordscount

[SyncfusionBuild]

The running CI Job is terminated due to changes committed on the source branch for this Merge Request and CI triggered for latest commit.

[SyncfusionBuild]

CI Status: ABORTED ❌
Source Compilation: FAILURE ❌
Build Location: 1035962-wordscount

[SyncfusionBuild]

Build Status: INPROGRESS 🔃
Build Location: 1035962-wordscount

[SyncfusionBuild]

CI Status: SUCCESS ✅
Source Compilation: SUCCESS ✅
Build Location: 1035962-wordscount
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