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.

LICENSE-COMMERCIAL

@@ -0,0 +1,50 @@
+Commercial License
+
+Copyright (c) 2025-2026 Agents Orchestrator. All rights reserved.
+
+TERMS AND CONDITIONS
+
+1. GRANT OF LICENSE
+
+   This software and associated documentation files (the "Software") located
+   under the directories `agor-pro/` and `src/lib/commercial/`, and any other
+   files bearing the SPDX header `LicenseRef-Commercial`, are licensed to
+   authorized users under the terms of a separate commercial agreement.
+
+2. RESTRICTIONS
+
+   Unless you have a valid commercial license agreement, you may not:
+
+   a. Copy, modify, merge, publish, distribute, sublicense, or sell copies
+      of the Software.
+   b. Reverse engineer, decompile, or disassemble the Software.
+   c. Remove or alter any proprietary notices, labels, or marks on the
+      Software.
+   d. Use the Software to provide a competing product or service.
+
+3. OWNERSHIP
+
+   The Software is the intellectual property of Agents Orchestrator and is
+   protected by copyright law. This license does not transfer ownership.
+
+4. NO WARRANTY
+
+   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+   IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+   FITNESS FOR A PARTICULAR PURPOSE, AND NONINFRINGEMENT. IN NO EVENT SHALL
+   THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES, OR OTHER
+   LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT, OR OTHERWISE, ARISING
+   FROM, OUT OF, OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+   DEALINGS IN THE SOFTWARE.
+
+5. TERMINATION
+
+   This license terminates automatically if you breach any of its terms. Upon
+   termination, you must destroy all copies of the Software in your possession.
+
+6. GOVERNING LAW
+
+   This license shall be governed by and construed in accordance with the laws
+   of the jurisdiction in which Agents Orchestrator is incorporated.
+
+For licensing inquiries, contact the Agents Orchestrator organization.