Building FR/DE: bring the translations in line with the Qt6 and CUPS update
The English page was corrected for the Qt6 default and the CUPS
requirement; without this the French and German readers were still being
given instructions that fail on current master.
Same three changes in each: Qt6 stated as the default with the Qt5 track
noted as retired, Qt6 package lists for Debian/Ubuntu, Fedora and Arch
with libsqlite3-dev and libcups2-dev, and an explanation that CUPS comes
from the bundled KDE Frameworks rather than from QET itself, with
-DBUILD_KF=NO as the alternative.
The Troubleshooting sections were stale in both -- they advised
installing Qt5 dev packages and setting Qt5_DIR. Replaced with the same
four entries as the English page, including the stale ~/.cache/qet-deps
that survives deleting the build directory.
Translated with machine assistance and checked for technical accuracy,
not by a native speaker. Corrections welcome, particularly to phrasing.
No translation note was added in the pages themselves, to match the
existing FR/DE pages which carry none.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Add French and German translations for Building page
- building-FR.md: Complete French translation of Building guide (350+ lines) covering installation prerequisites (Linux/macOS/Windows), step-by-step build process, build variants (debug/ASAN/TSan), testing, and troubleshooting
- building-DE.md: Full German translation with identical comprehensive coverage as French version
- languages.md: Updated to show Contributing and Building pages now complete for FR/DE
Tier 3 progress: 4 of 8 developer pages now translated to French and German.
Development path fully supported for French and German speakers.
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