chore: add mattrassurance synchronisation github workflow

[kirill-ivanov-mattr]

Adding a workflow to sync code of the repo to mattrassurance GitHub organisation when main branch is updated.

Description

Adding a workflow to sync code of the repo to mattrassurance GitHub organisation when main branch is updated.

• [ ] Tests for the changes have been added (for bug fixes / features)
• [x] The commit message(s) follow conventional commits
• [ ] Documentation has been added / updated (for bug fixes / features)
• [x] Changes follow the contributing document.

Motivation and Context

Adding a workflow to sync code of the repo to mattrassurance GitHub organisation when main branch is updated.

Code will be scanned for security vulnerabilities by Snyk after synchronisation

Does this PR introduce a breaking change?

• [ ] Yes
• [x] No

Which merge strategy will you use?

• [x] Squash
• [ ] Rebase (REVIEW COMMITS)