art: redo all README illustrations in crude MS-Paint style

Regenerated hero, fingerprint, how-it-works, architecture, and shield as
deliberately crude mouse-drawn Windows-Paint doodles on white — big blocky
flood-fill colors, wobbly aliased outlines, low-res, intentionally rough.
This commit is contained in:
leeguooooo
2026-06-12 13:38:12 +09:00
parent 61060486f4
commit 7ba82bc6cc
6 changed files with 4 additions and 0 deletions
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