feat(core): create system tray at runtime, closes #2278 (#4862)

Author: lucasfernog

.changes/runtime-tray.md

@@ -0,0 +1,7 @@
+---
+"tauri": minor
+"tauri-runtime": minor
+"tauri-runtime-wry": minor
+---
+
+Added APIs to create a system tray at runtime.

.changes/tray-destroy.md

@@ -0,0 +1,5 @@
+---
+"tauri": minor
+---
+
+Added the `SystemTrayHandle::destroy` method.

Cargo.toml

@@ -8,7 +8,7 @@ members = [
   "core/tauri-utils",
   "core/tauri-build",
   "core/tauri-codegen",
-  
+
   # integration tests
   "core/tests/restart",
   "core/tests/app-updater"