feat: add agor-pro commercial plugin crate and dual-repo infrastructure

agor-pro Tauri 2.x plugin (feature-gated via --features pro),
commercial Tauri config overlay, asymmetric test setup,
CI workflows (leak-check, commercial-build, PAT health),
pre-push hook, Makefile, CONTRIBUTING/MAINTENANCE/LICENSE-COMMERCIAL.

agor-pro/src/lib.rs

@@ -0,0 +1,35 @@
+// SPDX-License-Identifier: LicenseRef-Commercial
+//
+// agor-pro — Commercial plugin for Agents Orchestrator.
+// This crate is NOT open-source. It is distributed only via the
+// agents-orchestrator/agents-orchestrator private repository.
+
+use tauri::{
+    plugin::{Builder, TauriPlugin},
+    Runtime,
+};
+
+/// Initialize the agor-pro Tauri plugin.
+/// Registers all commercial commands and managed state.
+pub fn init<R: Runtime>() -> TauriPlugin<R> {
+    Builder::new("agor-pro")
+        .invoke_handler(tauri::generate_handler![
+            pro_status,
+        ])
+        .build()
+}
+
+#[tauri::command]
+fn pro_status() -> String {
+    "active".to_string()
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn test_pro_status() {
+        assert_eq!(pro_status(), "active");
+    }
+}