Upgrade .NET Version from 6 to 8

Currently, our project is using .NET version 6. However, with the release of .NET version 8, it's essential for us to upgrade to leverage the latest features, improvements, and security enhancements provided by the newer version.

**Goals:**
Upgrade the project's .NET version from 6 to 8.
Ensure compatibility with existing codebase and dependencies.
Test thoroughly to identify and address any compatibility issues or regressions.
**Steps to Reproduce (if applicable):**
N/A

**Additional Context:**
This upgrade aligns with our commitment to staying up-to-date with technology advancements and best practices.
Consideration should be given to any breaking changes between .NET 6 and 8, and how they might affect our project.
Any specific dependencies or libraries reliant on .NET 6 should be evaluated for compatibility with .NET 8.
**Acceptance Criteria:**
The project successfully builds and runs using .NET version 8.
All existing functionalities remain intact after the upgrade.
Comprehensive tests are performed to ensure the stability and reliability of the upgraded project.