chore: init ThothII repo — gitignore references, baseline docs (PRD, spec, harness plan)

.gitignore

@@ -0,0 +1,45 @@
+# === macOS ===
+.DS_Store
+
+# === Reference / consultation material (local-only, NOT ThothII deliverables) ===
+ChironeWp3/
+Thoth/
+
+# === Visual companion brainstorming artifacts (local-only) ===
+.superpowers/
+
+# === Python ===
+__pycache__/
+*.pyc
+*.pyo
+.venv/
+venv/
+*.egg-info/
+dist/
+build/
+
+# === Node ===
+node_modules/
+
+# === Secrets — NEVER commit ===
+.env
+*.pem
+ca-chain.pem
+config/ca-chain.pem
+
+# === Runtime data (sessions contain PII; indexes are derived) ===
+harness/sessions/
+harness/indexes/
+backend/sessions/
+backend/indexes/
+
+# === Test artifacts ===
+.pytest_cache/
+.ruff_cache/
+.coverage
+htmlcov/
+
+# === Editor ===
+.vscode/
+.idea/
+*.swp