docs: add MIT license and README

Co-authored-by: Cursor <cursoragent@cursor.com>

LICENSE

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+MIT License
+
+Copyright (c) 2026 cottongin
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

README.md

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+# Immich Frame
+
+An ESP32 firmware for the [M5Stack PaperColor](https://shop.m5stack.com/products/papercolor) e-ink display that turns it into a digital photo frame powered by your [Immich](https://immich.app/) server.
+
+## Features
+
+- **Photo cycling modes** -- random, chronological, reverse-chronological, favorites-weighted, and recency-weighted
+- **Deep sleep with batch caching** -- fetches multiple photo IDs per wake cycle to minimize network calls and extend battery life
+- **6-color e-ink rendering** -- Floyd-Steinberg dithering calibrated to the Spectra 6 palette with blue noise smoothing
+- **Portrait pairing** -- automatically pairs two portrait photos side-by-side
+- **Metadata overlays** -- date, time, location, people, album, and camera info as caption bars or corner badges
+- **Web UI** -- configure all settings, manage albums, trigger actions, and download wake logs from your browser
+- **Wake logging** -- persistent CSV log of each photo cycle that survives reboots and deep sleep
+
+## Hardware
+
+- [M5Stack PaperColor](https://shop.m5stack.com/products/papercolor) (ESP32-S3, 600x400 Spectra 6 e-ink, 1600mAh battery)
+
+## Requirements
+
+- [PlatformIO](https://platformio.org/) (CLI or IDE plugin)
+- An [Immich](https://immich.app/) server with an API key
+
+## Getting Started
+
+1. Clone the repository:
+
+   ```bash
+   git clone https://code.cottongin.xyz/cottongin/immich-frame.git
+   cd immich-frame
+   ```
+
+2. Build and flash:
+
+   ```bash
+   pio run -t upload
+   ```
+
+3. On first boot the device creates a `PaperColor-Setup` WiFi access point. Connect to it and open `192.168.4.1` in your browser.
+
+4. Enter your WiFi credentials, Immich server URL, and API key. The device reboots and begins displaying photos.
+
+## Configuration
+
+Once connected to your network, access the web UI at `http://papercolor.local` to manage:
+
+- **Slideshow** -- interval (2m to custom), cycling mode, image quality, deep sleep batch size
+- **Display** -- metadata overlay content and position, translucent badge backgrounds
+- **Albums** -- filter photos by specific Immich albums
+- **Device** -- sync time, download/clear wake logs, deep sleep, reboot, factory reset
+
+## Tools
+
+The `tools/` directory contains standalone HTML utilities for analyzing wake log CSV files:
+
+- `log-viewer.html` -- chart and table view of a single wake log
+- `log-compare.html` -- side-by-side comparison of multiple wake logs
+
+Open them directly in your browser; no server required.
+
+## License
+
+[MIT](LICENSE)