docs: add TEST-NEEDS.md (CRG C)

Author: hyperpolymath

TEST-NEEDS.md

@@ -0,0 +1,27 @@
+# TEST-NEEDS.md — halideiser
+
+## CRG Grade: C — ACHIEVED 2026-04-04
+
+## Current Test State
+
+| Category | Count | Notes |
+|----------|-------|-------|
+| Test files | 2 | Current state |
+
+## What's Covered
+
+- [x] 2 existing test file(s)
+- [x] Rust integration tests
+
+## Still Missing (for CRG B+)
+
+- [ ] Zig FFI tests (if applicable)
+- [ ] CI/CD test automation
+- [ ] Property-based tests
+- [ ] Edge case coverage
+
+## Run Tests
+
+```bash
+cargo test --all
+```