981760: Added UG Documentation for the FileManager component template support

[PrasanthMadhaiyan]

Feature description

Task - 981760 - Added UG Documentation for the FileManager component template support

Requirement and specification document

• API Review (Task link: https://dev.azure.com/EssentialStudio/Ej2-Web/_workitems/edit/971337)
• Azure Task with detailed feature information (Task link: https://dev.azure.com/EssentialStudio/Ej2-Web/_workitems/edit/968368)
• Not applicable
• Spec Location

Feature scope and impact

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

Output screenshots/demos

Feature matrix documentation

• Feature matrix document updated Centralized location
• Not applicable

Testing coverage

• Added sample in the UG.

Test cases and automation

• Test cases documented and attached to this PR
• BUnit tests added (PR link: Automation work assigned to testing team to avoid this in the future)
• Playwright tests added (PR link: _________________)
• 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: INPROGRESS 🔃
Build Location: ES-981760-dev-fm

[SyncfusionBuild]

CI Status: SUCCESS ✅
Source Compilation: SUCCESS ✅
Build Location: ES-981760-dev-fm
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]

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: ES-981760-dev-fm

[SyncfusionBuild]

Build Status: INPROGRESS 🔃
Build Location: ES-981760-dev-fm

[SyncfusionBuild]

CI Status: SUCCESS ✅
Source Compilation: SUCCESS ✅
Build Location: ES-981760-dev-fm
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