Add virtual integration: Piper (#27429)

source/_integrations/piper.markdown

@@ -0,0 +1,21 @@
+---
+title: Piper
+description: Connect and control your Piper instance using the Wyoming Protocol integration
+ha_category:
+  - Voice
+ha_domain: piper
+ha_release: '2023.5'
+ha_integration_type: virtual
+ha_supporting_domain: wyoming
+ha_supporting_integration: Wyoming Protocol
+ha_codeowners:
+  - '@balloob'
+  - '@synesthesiam'
+ha_config_flow: true
+ha_platforms:
+  - stt
+  - tts
+ha_iot_class: Local Push
+---
+
+{% include integrations/supported_brand.md %}