978180: Need to add Tooltip feature in UG documentation

[BarathAravindKannan]

Feature description

(Task link: https://dev.azure.com/EssentialStudio/Ej2-Web/_workitems/edit/968769/)
Need to display Tooltip in Grid content and header and also custom tooltip for header.

Requirement and specification document

• API Review (Task link: https://dev.azure.com/EssentialStudio/Ej2-Web/_workitems/edit/971596)
• Azure Task with detailed feature information (Task link: https://dev.azure.com/EssentialStudio/Ej2-Web/_workitems/edit/968769/)
• Not applicable

Feature scope and impact

• Core functionality (high impact)
• Enhancement to existing feature
• New standalone feature
• Experimental feature

Output screenshots/demos

After:

Tested with following combinations manually:

1. Sorting
2. Complex column
3. Filtering
4. Aggregates
5. Frozen
6. BrowserScrolling
7. InfiniteScrolling cases
8. Column chooser
9. Template samples in UG document
10. Editing cases
11. Stacked Header
12. Grouping cases
13. Re-ordering cases
14. Adding new record and then hovering – tooltip shows
15. Feature-matrix sample

Feature matrix documentation

• Feature matrix document updated Centralized location
• Not applicable

Testing coverage

• Tested against feature matrix
• Edge cases and error scenarios verified
• Cross-browser testing completed

Test cases and automation

• Test cases documented and attached to this PR
• BUnit tests added (PR link: _________________)
• Playwright tests added (PR link: https://gitea.syncfusion.com/essential-studio/blazor-grid-playwright-tests/pulls/1417/files)
• Manual testing only (justification: _________________)
• Not applicable

Test bed sample location

Provide the test bed sample location for code reviewers to verify the feature's behavior.

Platform verification

• Verified in Blazor Server
• Verified in Blazor WASM
• Not applicable

Related components

• Feature applicable to other components (Tasks created: _________________) (tagged "needs-attention-coreteam")
• Not applicable to other components

Breaking changes

• Contains breaking changes - provide migration guidance (added "breaking-change" label)
• No breaking changes

Performance verification

• Memory usage verified (no leaks)
• Rendering performance verified
• Not applicable

Reviewer Checklist

• Feature matrix documentation verified
• Test coverage verified
• Sample implementation reviewed
• Code meets standards and best practices
• C# implementation used appropriately (minimal JavaScript)

[SyncfusionBuild]

Build Status: INQUEUE 🕒
Build Location: 978180-ToolTip

[dhivyasyncfusion]

Hi @BarathAravindKannan , changes are fine

[SyncfusionBuild]

Build Status: INPROGRESS 🔃
Build Location: 978180-ToolTip

[SyncfusionBuild]

CI Status: SUCCESS ✅
Source Compilation: SUCCESS ✅
Build Location: 978180-ToolTip
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