[ECU STM32] Implement State Manager

[AksonovSergei]

📌 Description

TBD

✅ Checklist

• The task is implemented according to the requirements.
• The code is covered with unit tests.
• Static code analysis has been completed with no critical issues.
• A pull request has been created.
• The code has passed the code review.
• The pull request has been successfully merged.