New button template

README.md

@@ -63,11 +63,14 @@ point, use a composed template:
 
 ```bash
 anvil new weather_station --template weather --board uno
+anvil new clicker --template button --board uno
 ```
 
-The weather template builds on basic, adding a `WeatherApp` with a TMP36
-temperature sensor driver, managed example tests demonstrating both mock and
-simulator patterns, and student test starters. To see available templates:
+The **weather** template adds a `WeatherApp` with a TMP36 temperature sensor,
+managed example tests, and student test starters. The **button** template adds
+a `ButtonApp` with edge detection that prints "Button pressed!" to the serial
+monitor each time you press a button -- no repeated messages from holding it
+down. Both templates include mock and simulator patterns. To see all options:
 
 ```bash
 anvil new --list-templates
@@ -437,7 +440,7 @@ Upload these to a Gitea release. The script requires `build-essential`,
 cargo test
 ```
 
-615 tests (137 unit + 478 integration), ~4 seconds, zero warnings.
+642 tests (137 unit + 505 integration), ~4 seconds, zero warnings.
 
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