2023-10-31

General:

Finally finished converting all lights to the multi-channel API.
(but a few are untested due to hardware being unavailable)
Enabled smooth steps on almost all supported lights, including old ones.
(in some cases, on old t85 lights, some other things may have been removed
to make room)
Made smooth steps work better, and fixed several bugs.
Added/fixed RGB aux voltage on dual-fuel AA/li-ion drivers.
Fixed delay timing on all supported MCUs, so 1 "second" is closer to an
actual second (like in beacon mode or biking mode).
(especially attiny1616, which was 17% too slow)
Raised default thermal limit to 50C on attiny1616-based lights, since
it doesn't need as big an error margin as older MCUs.
Fixed missing item in globals menu on some lights.
Misc internal improvements and per-light tweaks.
Added a ChangeLog.md, to periodically summarize changes in a format which is
more readable than the raw commit logs.

New lights:

thefreeman-boost21-6a: Added. (1631)
(very nice HDR boost driver which fits into a FW3A)
thefreeman-boost-fwaa: Added. (1632)
(very nice AA/li-ion HDR boost driver which fits into a FWAA)

Hardware-specific changes:

Upgraded several builds to use delta-sigma modulation (DSM), for
lower lows and smoother ramping with less flicker or ripple:
- blf-lt1 (0621)
- blf-lt1-t1616 (0622)
- emisar-d4k-3ch (0151)
  (dramatically improves resolution and low modes on its 8-bit channel)
- noctigon-dm11-boost (0273)
- noctigon-kr4-boost (0216)
- noctigon-k1-boost (0253)
- noctigon-m44 (0143)
Upgraded some builds to use dynamic PWM, for lower lows and smoother ramping:
- blf-q8-t1616, sofirn-sp36-t1616 (0613, 0614)
- gchart-fet1-t1616 (1618)
- noctigon-k1-sbt90 (0252)
wurkkos-ts10, wurkkos-ts10-rgbaux: Fixed too-high default ceiling. (0713, 0714)

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