The code for Helix rev3 boards could not be built with, e.g.,
`CONVERT_TO=rp2040_ce` due to invalid `#include <stdio.h>` in the
keyboard level `config.h` (apparently the AVR version of that file
contains guards against usage in assembly code, which was hiding the
bug). Move `#include <stdio.h>` to the C sources which need it.
* Clean up `DEBOUNCE` in config.h, 0-9
* Clean up `DEBOUNCE` in config.h, A
* Clean up `DEBOUNCE` in config.h, B
* Clean up `DEBOUNCE` in config.h, C
* Clean up `DEBOUNCE` in config.h, D
* Clean up `DEBOUNCE` in config.h, E
* Clean up `DEBOUNCE` in config.h, F
* Clean up `DEBOUNCE` in config.h, G
* Clean up `DEBOUNCE` in config.h, H
* Clean up `DEBOUNCE` in config.h, handwired
* Clean up `DEBOUNCE` in config.h, I
* Clean up `DEBOUNCE` in config.h, J
* Clean up `DEBOUNCE` in config.h, K
* Clean up `DEBOUNCE` in config.h, L
* Clean up `DEBOUNCE` in config.h, M
* Clean up `DEBOUNCE` in config.h, N
* Clean up `DEBOUNCE` in config.h, O
* Clean up `DEBOUNCE` in config.h, P
* Clean up `DEBOUNCE` in config.h, Q
* Clean up `DEBOUNCE` in config.h, R
* Clean up `DEBOUNCE` in config.h, S
* Clean up `DEBOUNCE` in config.h, T
* Clean up `DEBOUNCE` in config.h, U
* Clean up `DEBOUNCE` in config.h, V
* Clean up `DEBOUNCE` in config.h, W
* Clean up `DEBOUNCE` in config.h, X
* Clean up `DEBOUNCE` in config.h, Y
* Clean up `DEBOUNCE` in config.h, Z
* Remove default debounce from info.json
* Migrate non-default debounce to info.json
* Replace Tapping Force Hold feature with Quick Tap Term
* Replace keyboard level TAPPING_FORCE_HOLD with QUICK_TAP_TERM 0
* Deprecate force hold in info_config.json
* Before and after quick tap term unit tests
* Quick tap unit tests iteration
* Keymap config.h correction
* Remove TAPPING_FORCE_HOLD_PER_KEY macros that were missed
* Add two more test cases for quick tap
* Replace TAPPING_FORCE_HOLD with QUICK_TAP_TERM in configs #2
* Replace TAPPING_FORCE_HOLD_PER_KEY with QUICK_TAP_TERM_PER_KEY in configs #2
* Add function declaration for get_quick_tap_term
Co-authored-by: Stefan Kerkmann <karlk90@pm.me>