Intent script: allow setting description and platforms (#118500)

* Add description to intent_script

* Allow setting platforms

tests/components/intent_script/test_init.py

@@ -22,6 +22,8 @@ async def test_intent_script(hass: HomeAssistant) -> None:
         {
             "intent_script": {
                 "HelloWorld": {
+                    "description": "Intent to control a test service.",
+                    "platforms": ["switch"],
                     "action": {
                         "service": "test.service",
                         "data_template": {"hello": "{{ name }}"},
@@ -36,6 +38,17 @@ async def test_intent_script(hass: HomeAssistant) -> None:
         },
     )
 
+    handlers = [
+        intent_handler
+        for intent_handler in intent.async_get(hass)
+        if intent_handler.intent_type == "HelloWorld"
+    ]
+
+    assert len(handlers) == 1
+    handler = handlers[0]
+    assert handler.description == "Intent to control a test service."
+    assert handler.platforms == {"switch"}
+
     response = await intent.async_handle(
         hass, "test", "HelloWorld", {"name": {"value": "Paulus"}}
     )
@@ -78,6 +91,16 @@ async def test_intent_script_wait_response(hass: HomeAssistant) -> None:
         },
     )
 
+    handlers = [
+        intent_handler
+        for intent_handler in intent.async_get(hass)
+        if intent_handler.intent_type == "HelloWorldWaitResponse"
+    ]
+
+    assert len(handlers) == 1
+    handler = handlers[0]
+    assert handler.platforms is None
+
     response = await intent.async_handle(
         hass, "test", "HelloWorldWaitResponse", {"name": {"value": "Paulus"}}
     )