1007601: updated the getting stated folder structure app.component issue

[MOHANRAJSF4991]

Updated the getting started of Angular Spreadsheet and renamed file structure

Angular Version	Default Root File
Angular 2 – Angular 19	app.component.ts
Angular 20+	app.ts

[SyncfusionBuild]

Build Status: INPROGRESS 🔃
Build Location: EJ2-1007601-update

[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: EJ2-1007601-update

[SyncfusionBuild]

Build Status: INPROGRESS 🔃
Build Location: EJ2-1007601-update

[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: EJ2-1007601-update

[SyncfusionBuild]

Build Status: INPROGRESS 🔃
Build Location: EJ2-1007601-update

[SyncfusionBuild]

CI Status: FAILURE ❌
Source Compilation: SUCCESS ✅
Failure Reason: CI Failure with violation
Build Location: EJ2-1007601-update
Technical Error(s): 0
Spelling Error(s): 7
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