Add time platform docs (#24987)

Co-authored-by: Franck Nijhof <frenck@frenck.nl>

source/_integrations/time.markdown

@@ -0,0 +1,31 @@
+---
+title: Time
+description: Instructions on how to set up time entities within Home Assistant.
+ha_category:
+  - Time
+ha_release: '2022.12'
+ha_domain: time
+ha_quality_scale: internal
+ha_codeowners:
+  - '@home-assistant/core'
+ha_integration_type: entity
+---
+
+The Date integration is built for the controlling and monitoring of times on devices.
+
+Time entities cannot be implemented manually, but can be provided by other integrations. If you are looking for a way to create a similar entity, please take a look at the [Date/Time helper](/integrations/input_datetime).
+
+## Services
+
+### time services
+
+Available services: `time.set_value`
+
+### Service `time.set_value`
+
+Set a new value for the time entity.
+
+| Service data attribute | Optional | Description |
+| ---------------------- | -------- | ----------- |
+| `entity_id` | no | String or list of strings that point at `entity_id`'s of times to control.
+| `time` | no | New time value to set.