Add Peer Production License (copyfarleft)

Apply the Peer Production License to the macha-autonomous codebase.

The PPL is a copyfarleft license that restricts commercial use to
worker-owned cooperatives and collectives, preventing exploitation by
for-profit companies that use wage labor.

This aligns with the commons-based peer production model and ensures
that the fruits of this work benefit worker-owned entities and the
broader commons, not extractive capitalist enterprises.

Key changes:
- Add LICENSE file with full Peer Production License text
- Update README.md with license information and usage guidelines
- Clarify that worker cooperatives can use commercially
- Restrict for-profit wage-labor companies from commercial use

For more info: https://wiki.p2pfoundation.net/Peer_Production_License

README.md

@@ -86,7 +86,15 @@ See `DESIGN.md` for comprehensive architecture documentation.
 
 ## License
 
-[Add your license here]
+This project is licensed under the **Peer Production License (PPL)** - see the [LICENSE](LICENSE) file for details.
+
+The PPL is a copyfarleft license that allows:
+- ✅ Worker-owned cooperatives and collectives to use commercially
+- ✅ Non-profit organizations to use for any purpose
+- ✅ Individuals to use for personal/non-commercial purposes
+- ❌ For-profit companies using wage labor to use commercially
+
+For more information about the Peer Production License, see: https://wiki.p2pfoundation.net/Peer_Production_License
 
 ## Author