Add support for time entities (#6399)

* Add time entities

* Add tests

* Add myself to datetime codeowners

* Fix publishing times with 0 values

* Log performing TimeCall

* Implement `on_time` trigger

* Rename var

* Fix initial value for time

* Add arg name for clarity

* Remove useless checks

tests/components/template/test.all.yaml

@@ -153,3 +153,16 @@ datetime:
             - x.year
             - x.month
             - x.day_of_month
+  - platform: template
+    name: Time
+    id: test_time
+    type: time
+    set_action:
+      - logger.log: "set_value"
+    on_value:
+      - logger.log:
+          format: "Time: %02d:%02d:%02d"
+          args:
+            - x.hour
+            - x.minute
+            - x.second