[Bug]: Enhance Get Started documentation to include application/lib/sdk creation flow

[kpanot]

Package name

core

Package version

9..

Reproduction steps

Going to landing page https://github.com/AmadeusITGroup/otter Or to dedicated Get Started page: https://github.com/AmadeusITGroup/otter/blob/main/docs/core/START_NEW_APPLICATION.md

Current result

• The link on the landing page to the "Otter Get Started" is broken.
• The documentation is completely missing the following steps:
  • Creation of application
  • Creation of SDK
  • Creation of library
  • Usage of the SDK in the application
• The documentation is incorrect regarding
  • The configuration (in angular.json) to manually set
  • The way to integrate Angular Material

Expected result

A documentation to start a new project with Application, SDK and optionally a library.

Additional comments

No response