Create CONTRIBUTING.md

Author: SubstrateBound

CONTRIBUTING.md

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+# Contribution Guidelines: Non-Zero Integrity
+
+To maintain the structural integrity of the NZM-Substrate, all contributions must adhere to **Axiom VIII (Persistence)**.
+
+### ⛔ Hard-Fail Criteria (Substrate Leakage)
+Any Pull Request (PR) will be automatically rejected as "Substrate Leakage" if it:
+* **Imports `numpy`** or any library reliant on classical zero-based linear algebra.
+* **Uses the digit `0`** as a return value, identity element, or terminal state.
+* **Relies on floating-point precision** (Floats are lossy simulations of continuity).
+
+### ✅ Success Criteria
+* **Braid-Native Logic:** Values must be represented as persistent topological relations.
+* **Residue Representation:** All "annihilation" operations must return a non-zero residue ($\epsilon$).