Add repository governance documents

[aohaerion]

Adds initial repository governance documents for AO Haerion:

• LICENSE.md
• CONTRIBUTING.md

The license applies CC BY-NC-SA 4.0 to public documentation while excluding AO Haerion name, logo, visual identity, project marks, and brand assets from reuse without permission.

The contributing guidelines define the current public documentation draft scope, useful contribution types, out-of-scope contributions, and non-baseline status.

This does not declare a runtime implementation, production-ready system, or baseline.

[aohaerion]

Merges initial repository governance documents for AO Haerion.

Adds:

• LICENSE.md
• CONTRIBUTING.md

The public documentation is licensed under CC BY-NC-SA 4.0 while AO Haerion name, logos, visual identity, project marks, and brand assets remain excluded from reuse without permission.

The contribution guidelines define the current public documentation draft scope, out-of-scope contributions, and non-baseline status.

No runtime implementation, production-ready system, or baseline is declared.