implement repo policies: Makefile, Dockerfile, CI, prettier, editorconfig, LICENSE

Add failure stories section to OPENCLAW_TRICKS.md covering 10 real production
failures and fixes from the first three weeks of operation.

Makefile

@@ -0,0 +1,22 @@
+.PHONY: fmt fmt-check lint test check hooks
+
+fmt:
+	npx prettier --write .
+
+fmt-check:
+	npx prettier --check .
+
+lint:
+	@echo "No linter configured for docs-only repo"
+
+test:
+	@echo "No tests for docs-only repo"
+
+check: fmt-check
+	@echo "All checks passed"
+
+hooks:
+	echo '#!/bin/sh\nmake check' > .git/hooks/pre-commit && chmod +x .git/hooks/pre-commit
+
+docker:
+	docker build .