- Modified build.yml to accept optional version input parameter
- Modified nightly.yml to calculate VERSION from build date in format yymmddb
- VERSION is passed as PLATFORMIO_BUILD_FLAGS to override default in wled.h
- Other workflows (wled-ci.yml, release.yml) unchanged and will use default VERSION
Co-authored-by: softhack007 <91616163+softhack007@users.noreply.github.com>