Add push to talk voice assistant (#4648)

* Add push to talk voice assistant

* Refactor most code into voice_assistant

* Make voice_assistant the component and remove push_to_talk (can be done in yaml)

* Fix component setup

* Always AF_INET to match serverside

* Fix microphone and media player co-existence

* Format

* Update codeowners

* Update test file

* Fix endifs

* nullptr not NULL

* clang-tidy

* Format

* fixup: Add VA event data

* Generate proto

* Parse and log events

* Add default to switch

* Fix

* Add mic/va to test5

esphome/components/api/api_server.h

@@ -95,6 +95,11 @@ class APIServer : public Component, public Controller {
   void request_time();
 #endif
 
+#ifdef USE_VOICE_ASSISTANT
+  void start_voice_assistant();
+  void stop_voice_assistant();
+#endif
+
   bool is_connected() const;
 
   struct HomeAssistantStateSubscription {