Allow the user to provide a custom reference time

[dar-dev]

This PR allows the user to provide a custom reference time such as a frame counter or an alternative high-precision timing source.

Key Benefits:

• Extensibility: Developers can now easily adapt the framework to use custom timing mechanisms specific to their domain or application needs.
• Flexibility: The TimingFramework becomes more adaptable for advanced or niche scenarios, such as high-precision timing in game development or scientific simulations.
• Compatibility: Maintains seamless operation for existing users while providing a pathway for future enhancements.