Add heiwa integration (#24558)

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

source/_integrations/gree.markdown

@@ -37,6 +37,7 @@ Any Gree Smart device working with the Gree+ app should be supported, including
 - Cooper & Hunter
 - Proklima
 - Tadiran
+- Heiwa
 
 ## Climate
 

source/_integrations/heiwa.markdown

@@ -0,0 +1,20 @@
+---
+title: Heiwa
+description: Connect and control your Heiwa devices using the Gree Climate integration
+ha_category:
+  - Climate
+ha_release: 2022.11.0
+ha_iot_class: Local Polling
+ha_config_flow: true
+ha_codeowners:
+  - '@renaiku'
+ha_domain: heiwa
+ha_platforms:
+  - climate
+  - switch
+ha_integration_type: integration
+ha_supporting_domain: gree
+ha_supporting_integration: Gree Climate
+---
+
+{% include integrations/supported_brand.md %}