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

[maphineth]

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.