Refactored GitHub Actions workflow **Build guide PDF** (`scripts\build_guide_pdf.py`): now builds both light and dark mode PDFs (`export/thgtoa.pdf` and `export/thgtoa-dark.pdf` respectively). Signed-off-by: nopeitsnothing <no@anonymousplanet.org>
Added workflow for building PDF. Progress. Signed-off-by: nopeitsnothing <no@anonymousplanet.org>