Initial commit: Paperwall, a standalone e-ink dashboard

Navidrome now-playing, clock, and weather for a Waveshare epd4in0e panel,
with a local web UI and install/uninstall scripts for the Pi.

.gitignore

@@ -0,0 +1,8 @@
+__pycache__/
+*.pyc
+venv/
+.venv/
+mock_output/
+web/static/*.png
+config.json
+config.json.tmp