1008844: Angular getting started revamp in hotfix

[BalajiLoganathanSF4826]

Description

Updated the getting started documentation for angular platform in hotfix.

Changes done

• Updated the code snippets to angular 21
• Updated the documentation to match with angular 21
• Removed .component suffix for all angular file references

[SyncfusionBuild]

Build Status: INPROGRESS 🔃
Build Location: EJ2-1008844-validate-ang-hf

[SyncfusionBuild]

CI Status: FAILURE ❌
Source Compilation: SUCCESS ✅
Failure Reason: CI Failure with violation
Build Location: EJ2-1008844-validate-ang-hf
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): 166
File Path Error(s): 0
CodeSnippet File Path Missing Error(s): 13
Toc Anchor Tags Validation Error(s): 0
MD Tag Validation Error(s): 0

[AnanthaGokulaRaman]

Fine.

[SyncfusionBuild]

Build Status: INPROGRESS 🔃
Build Location: EJ2-1008844-validate-ang-hf

[SyncfusionBuild]

CI Status: FAILURE ❌
Source Compilation: SUCCESS ✅
Failure Reason: CI Failure with violation
Build Location: EJ2-1008844-validate-ang-hf
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): 166
File Path Error(s): 0
CodeSnippet File Path Missing Error(s): 13
Toc Anchor Tags Validation Error(s): 0
MD Tag Validation Error(s): 0