documentation(EJ2-1025145): Porting works in Angular spreadsheet component

[DeiraSF4418]

Need to include the changes done in react documentation into angular documentation.

• getting started section changes
• web-services section
• server-deployment
• open-file folder structure
• save-file folder structure
• how-to-overview section.

Task link - https://dev.azure.com/EssentialStudio/Ej2-Web/_workitems/edit/1025145/

[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: Not Started ❌
Build Location: EJ2-1025145-newChanges

[SyncfusionBuild]

Build Status: INQUEUE 🕒
Build Location: EJ2-1025145-newChanges

[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: Not Started ❌
Build Location: EJ2-1025145-newChanges

[SyncfusionBuild]

Build Status: INQUEUE 🕒
Build Location: EJ2-1025145-newChanges

[SyncfusionBuild]

Build Status: INPROGRESS 🔃
Build Location: EJ2-1025145-newChanges

[SyncfusionBuild]

CI Status: FAILURE ❌
Source Compilation: SUCCESS ✅
Failure Reason: CI Failure with violation
Build Location: EJ2-1025145-newChanges
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): 10
File Path Error(s): 1
CodeSnippet File Path Missing Error(s): 0
Toc Anchor Tags Validation Error(s): 0
MD Tag Validation Error(s): 0