Pattern support

[ZiGaMi]

Check options to add button patterns to callback registrations. First user shall create pattern with defined ON/OFF states and timings.

Pattern create API:

// Create new button pattern
button_pattern_t my_pattern = {0};
button_pattern_init( &my_pattern );

// Add ON interval, for 1sec
button_pattern_add( &my_pattern, ON, 1.0f );

// Add OFF inteval for 0.2sec
button_pattern_add( &my_pattern, OFF, 0.2f );

// Use created pattern in callback registration
button_register_callback( eBTN_MY, btn_pattern_cb, &pattern );