Modify the code (PID_v1.h) with these improvements for better efficiency

[Maphineth-UNG]

The file defines a PID class for a control system, including several functions and variables that handle PID calculations, configurations, and mode settings. It includes:
- Constants for configuration.
- Public methods for setting modes, computing PID outputs, setting output limits, tuning parameters, etc.
- Private member variables for storing PID parameters and tracking the state.

I have modified the file to enhance its efficiency by:
- Replacing #define macros with constexpr for better type safety.
- Using initializer lists in constructors for improved performance.
- Making getter methods inline to optimize frequently accessed functions.