Fix macro collision: Replace print macros with inline template functions

[berni2612]

Motivation

When compiling the thelsing/knx library in environments like ESP-IDF or ESPHome, it is often necessary to define KNX_NO_PRINT to avoid conflicts with the host framework's UART implementation.

The Issue

Currently, when KNX_NO_PRINT is defined, the library falls back to C-style preprocessor macros:
#define print(...) do {} while(0)

This aggressive macro replacement causes severe naming collisions. If the host framework (e.g., ESP-IDF or ESPHome core files) uses print or println as legitimate method names inside other classes, the preprocessor blindly replaces them, resulting in fatal expected unqualified-id before 'do' compilation errors.

The Solution

This PR replaces the #define macros in bits.h with empty static inline void template functions.
This achieves the exact same zero-overhead behavior when KNX_NO_PRINT is active, but safely respects C++ namespaces and class scopes, completely resolving the compilation errors in ESPHome/ESP-IDF integrations.