Initial implementation of Sahsa Clock

Pygame framebuffer clock for Le Potato (ARM Debian) with aiohttp webhook server.
Renders 12-hour clock directly to /dev/fb0 (no X11/Wayland). Supports full-screen
message overlays pushed via a browser dashboard or Bearer-token API. Includes
first-run setup wizard, session-based dashboard auth, bcrypt password storage,
per-IP rate limiting, and systemd service unit.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

requirements.txt

@@ -0,0 +1,5 @@
+pygame>=2.5.0
+aiohttp>=3.9.0
+bcrypt>=4.0.0
+# Uncomment if using Python < 3.11 (tomllib is stdlib in 3.11+):
+# tomli>=2.0.0