Create NOTICE file with patent and trademark notice

Author: maple-underscore

NOTICE

@@ -0,0 +1,34 @@
+Patent and Trademark Notice
+
+The CC BY-NC-SA 4.0 license does NOT grant any rights to:
+
+1. PATENTS
+   No patent license is granted by this software. Any patents held by
+   maple-underscore or contributors are NOT licensed for use.
+
+2. TRADEMARKS
+   The following names and marks are NOT licensed:
+   - "arrastools"
+   - Any logos or branding
+   - The name "maple-underscore"
+   
+   You may not use these marks to imply endorsement or association
+   without explicit written permission.
+
+3. COMMERCIAL USE
+   Contact maple-underscore for commercial licensing inquiries.
+
+Commercial Use Clarification:
+
+✅ Allowed (Non-Commercial):
+- Personal hobby projects
+- Educational coursework
+- Academic research (even if grant-funded)
+- Internal business tools (if not sold/distributed)
+
+❌ NOT Allowed (Commercial):
+- Selling the software or derivative works
+- Using in a SaaS product or service
+- Bundling with commercial software
+- Using to provide paid services
+- Monetizing through the software