Decouple core Yaak logic from Tauri (#354)

crates-tauri/yaak-license/src/lib.rs

@@ -0,0 +1,17 @@
+use tauri::{
+    Runtime, generate_handler,
+    plugin::{Builder, TauriPlugin},
+};
+
+mod commands;
+pub mod error;
+mod license;
+
+use crate::commands::{activate, check, deactivate};
+pub use license::*;
+
+pub fn init<R: Runtime>() -> TauriPlugin<R> {
+    Builder::new("yaak-license")
+        .invoke_handler(generate_handler![check, activate, deactivate])
+        .build()
+}