Call board_init before initing the on-board LEDs

[Neradoc]

On the QT PY (M0 and 2040) there is a NEOPIXEL_POWER pin required to enable the neopixel. It is set in board_init, after the rgb_led_status_init (in main.c), too late for wait_for_safe_mode_reset to use the neopixel.

This PR moves the LED inits and safe mode related functions to after board_init().

[Neradoc]

Oh wait that won't work.
filesystem_init must be before board_init (because of SPI displays as stated by the comment in main.c).
board_init must be before wait_for_safe_mode_reset so the status LED can be used.
wait_for_safe_mode_reset must be before filesystem_init (uses safe_mode in an argument). (How did I miss that ?)
This needs a different type of solution.