Add docs for Vulcan integration (#17551)

source/_integrations/vulcan.markdown

@@ -0,0 +1,28 @@
+---
+title: Uonet+ Vulcan
+description: Instructions on setting up Uonet+ Vulcan within Home Assistant.
+ha_category:
+  - Calendar
+ha_iot_class: Cloud Polling
+ha_release: 2022.4
+ha_domain: vulcan
+ha_codeowners:
+  - '@Antoni-Czaplicki'
+ha_config_flow: true
+ha_quality_scale: platinum
+ha_platforms:
+  - calendar
+---
+
+The Uonet+ Vulcan integration allows you to view timetable from your e-register.
+
+Supported informations:
+
+- Timetable
+
+## Prerequisites
+
+To use Uonet+ Vulcan integration in Home Assistant you must obtain `token`, `symbol` and `pin` from your Vulcan account. You can find them in the student/parent panel in `Mobile access`/`Dostęp mobilny` tab.
+
+{% include integrations/config_flow.md %}
+