Rename project to Kao

- Renamed sentry.py to kao.py
- Updated all references from Sentry-Emote to Kao
- Kao (顔) means "face" in Japanese

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

README.md

@@ -1,4 +1,4 @@
-# Sentry-Emote
+# Kao
 
 A minimalist system status monitor that uses ASCII emotes to display server health on an old phone.
 
@@ -20,14 +20,14 @@ Turn an old phone (with its OLED screen) into a glanceable ambient display for y
 
 ```bash
 # Clone and setup
-git clone https://github.com/yourusername/sentry-emote.git
-cd sentry-emote
+git clone https://github.com/yourusername/kao.git
+cd kao
 python -m venv venv
 source venv/bin/activate  # Windows: .\venv\Scripts\activate
 pip install -r requirements.txt
 
 # Run everything
-python sentry.py
+python kao.py
 ```
 
 Open http://localhost:5000 on your phone (use Fully Kiosk Browser for best results).