feat: add standalone Playwright recorder tool with Docker-based codegen

- introduce repo-local, ephemeral Playwright codegen workflow
- add executable codegen script using official Playwright Docker image
- persist generated recordings under recordings/ (git-ignored, .gitkeep)
- add minimal Makefile with install and codegen targets
- switch project license to MIT
- improve README with clear usage, requirements, and design rationale
- add MIRRORS file for multi-remote setup
- clean up gitignore for generated artifacts and node tooling

Makefile

@@ -0,0 +1,21 @@
+.PHONY: help install codegen
+
+## 📖 Show help
+help:
+	@echo ""
+	@echo "🎭 playwright-recorder"
+	@echo ""
+	@echo "Targets:"
+	@echo "  make install   🔧 Prepare the recorder (chmod +x)"
+	@echo "  make codegen   🎥 Record Playwright tests via GUI"
+	@echo "  make help      📖 Show this help"
+	@echo ""
+
+## 🔧 One-time setup
+install:
+	@chmod +x scripts/codegen.sh
+	@echo "✔ scripts/codegen.sh is now executable"
+
+## 🎥 Run Playwright Codegen (GUI recording)
+codegen:
+	bash scripts/codegen.sh