SeSi-0.8.7+ShSi-B12

What's Changed

• feat: add lafrite-smartcard non-dev profile + build profiles documentation by @3rdIteration in #109
• Merge Luckfox Pico build support into seedsigner-os by @3rdIteration in #110
• fix: La Frite non-dev WiFi/USB-gadget hardening + pgpy bz2 dependency by @3rdIteration in #111
• Add testing-build marker wiring, off by default by @3rdIteration in #112

Full Changelog: SeSi-0.8.7+ShSi-B11...SeSi-0.8.7+ShSi-B12