Add Tesserae to Projects

[dmellok]

What's being added

Tesserae, a self-hosted e-ink dashboard server. Composes tile layouts in the browser and pushes rendered frames to e-ink panels driven by Raspberry Pi, ESP32, jailbroken Kindle (via the TRMNL BYOS protocol), and native TRMNL devices.

Slotted into the Projects section in alphabetical order, between TeslaCam and Ultimate DNS Shield.

Pi relevance

• Two in-tree Pi clients: pi_bin_client (packed-palette, low-bandwidth, ideal for battery-backed Pi Zero panels) and pi_png_client (standard PNG, always-on Pi running Pimoroni Inky or similar HATs).
• Server runs on Pi 4 / 5: uses Playwright Chromium for headless rendering, so a Pi 4 with 4GB+ is the realistic minimum on the server side.
• Multi-head dashboards: one Pi server can drive multiple panels at different sizes, useful for whole-home dashboards with mixed hardware.

Why it's awesome

• Drop-a-folder plugin model for widgets, renderers, and devices. Adding new panel kinds is a contained change, not a fork.
• 30 bundled widgets plus a community catalog of 16 more, one-click installable from the admin UI.
• Home Assistant integration: MQTT auto-discovery, webhook push, and an official HA add-on.
• Active development, current release v0.64.8, AGPL-3.0-or-later.

Resources

• Documentation: https://dmellok.github.io/tesserae/
• Pi client install guide: https://dmellok.github.io/tesserae/install/clients/
• Widget gallery: https://dmellok.github.io/tesserae/widgets/gallery/
• Architecture overview: https://dmellok.github.io/tesserae/dev/architecture/

Contributing checklist

• Alphabetical placement matches the existing pattern (between TeslaCam and Ultimate DNS Shield)
• Description is brief (one sentence, ~25 words) matching the section's median
• Link is the official repository
• No support badge added (Pi 4+ realistic minimum, but no rpi-4 badge exists in the repo)
• Project is actively maintained and adheres to the Awesome Manifesto