docs: add web interface and mobile functions info to README

Add documentation about the web interface (index.html and webapi.py) including how to run it and available endpoints. Also document the mobile API functions (mobile-login, mobile, mobile-game) that can be used for debugging or when the web interface is not available.

README.md

@@ -62,6 +62,42 @@ myice mobile-login
 
 This will output the necessary information that you can add to your `myice.ini` file.
 
+## web interface
+
+The tool includes a web interface that can be accessed by running the web API server:
+
+```shell
+uv run fastapi run myice/webapi.py
+```
+
+Then open your browser at `http://localhost:8000`. The web interface allows you to:
+
+- Select between different configured accounts
+- View upcoming games and practices
+- See detailed information about events including player rosters
+
+The web API provides the following endpoints:
+
+- `/schedule` - Get the schedule for a specific account
+- `/game/{game_id}` - Get details for a specific game
+- `/accounts` - Get a list of available accounts
+- `/health` - Health check endpoint
+
+All endpoints (except `/health`) require an Authorization header with a Bearer token.
+For development purposes, you can use `abc` as the token.
+
+## mobile functions
+
+The tool includes several mobile API functions that interact with MyIce's
+mobile API:
+
+- `myice mobile-login` - Authenticate and get authentication tokens
+- `myice mobile` - Fetch game data using the mobile API
+- `myice mobile-game {game_id}` - Get detailed information about a specific game
+
+These functions can be useful for debugging or when the regular web
+interface is not available.
+
 ## fetch schedule
 
 ```shell