* Use less tap dance memory.

Use dynamically allocated sparse array for tap dance state, dynamically allocate tap dance state when needed and free it when the tap dance is done.

* new approach

* Use null, check for null

* Reformat with docker

* Use uint8 with idx rather than uint16 with keycode in state

* fix accidental change

* reformat

* Add null check

* add documentation tip suggested by tzarc

* Only allow tap dance state allocation on key down, not on key up

Co-authored-by: Sergey Vlasov <sigprof@gmail.com>

* Only allow tap dance allocation on key down, not on key up

Co-authored-by: Sergey Vlasov <sigprof@gmail.com>

* add user action required section

---------

Co-authored-by: Sergey Vlasov <sigprof@gmail.com>

* docs: fix misspellings

* docs: do line breaks with HTML instead of spaces

To remove trailing spaces and to avoid breaking things, line breaks can
be done with the HTML br tag.

* Refactor debounce counters with direct indexing

* Refactor code to use array indexing for debounce_counters
* Use global MATRIX_ROW_SHIFTER macro

* Refactor debounce algorithm with static allocation

* Converted arrays to static allocation
* Standardised use of MATRIX_ROWS_PER_HAND for array sizing
* Added Doxygen comments for primary debounce functions
* Removed debounce_free()

* Rewrite sym_defer_pr

* Modernise code using sym_defer_pk as template
* Format consistency with other current algorithms

* Use shorter SPDX-License-Identifier

* Remove ChibiOS core memory manager guard
* Keep type definition within DEBOUNCE guard

* Add change log

* Minor optimisation refactor

* Pre-calculate row_offset in per-key matrix loops
* Add inline compiler hints
* Improve readability with blank lines

* Limit elapsed time to the maximum debounce value

* Apply suggestions from code review

Declare counters with "DEBOUNCE_ELAPSED"

Co-authored-by: Joel Challis <git@zvecr.com>

* Update change log to new breaking change date

---------

Co-authored-by: Joel Challis <git@zvecr.com>

* Initial tidying up of top level helix/ directory

Align readme.md with template & provide more detailed PCB information
Remove unused rules.mk
Add common config.h file
Update glcdfont.c with formatting and license header

* Further migrations after PRs merged

Move shared configuration to top level info.json and config.h
More descriptive hardware compatibility

* Add changelog

* Align configuration between PCBs

- Migrate beta & pico to use RGB Matrix
- Move previously RGB Matrix-dependent OLED code in rev3/rev3.c to top level
- Remove reundant OLED code in beta/beta.c
- Remove RGBLight references

* Update changelog with RGB Matrix configuration

Co-authored-by: Nick Brassel <nick@tzarc.org>

Co-authored-by: Drashna Jaelre <drashna@live.com>
Co-authored-by: Nick Brassel <nick@tzarc.org>