Automate duplicating/copying modifications to importable package sample

[robGG1997]

Summary
automate the way we update importable package sample from imported sample in UnitySampleProject, when we update the imported sample files, importable sample files should also be updated.

Suggested features or ways to address the summary

• using a bash script to copy changes to importable sample folder
• using git actions in workflow or git hooks to add/stage or commit those changes on push or pre-commit

Motivation
This will make dev workflow for modifying importable samples automated