Jakub c7009140ce refactor: rename firmware from Plus to Solo ...

- FIRMWARE_VERSION: v1.15-plus.1 → v1.15-solo.1
- FIRMWARE_PLUS_BUILD → FIRMWARE_SOLO_BUILD in all platformio.ini and UITask.cpp
- docs/plus_features/ → docs/solo_features/ (all sub-docs moved)
- README: update all doc links plus new Documentation section
- GitHub Actions: extract GIT_TAG_VERSION in each build job (was missing,
  causing empty FIRMWARE_VERSION in builds); rename output files to
  solo-VERSION-oled.uf2 / solo-VERSION-eink.uf2; release title → "Solo VERSION"

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

2026-05-29 12:25:34 +02:00

..

lck_scr_1_eink.png

refactor: rename firmware from Plus to Solo

2026-05-29 12:25:34 +02:00

lck_scr_1_oled.png

refactor: rename firmware from Plus to Solo

2026-05-29 12:25:34 +02:00

lck_scr_2_eink.png

refactor: rename firmware from Plus to Solo

2026-05-29 12:25:34 +02:00

lck_scr_2_oled.png

refactor: rename firmware from Plus to Solo

2026-05-29 12:25:34 +02:00

screen_lock.md

refactor: rename firmware from Plus to Solo

2026-05-29 12:25:34 +02:00