Extending middleware registration, config options, and test coverage

[etwodev]

📄 Scope

This merge request introduces extensive improvements to the ramchi library:

🚀 Features

• Middleware can now be toggled per global, router, and route level based on config values.
• Logger is injected via middleware and extracted from context.Context.
• CORS is fully configurable via allowedOrigins in ramchi.config.json.

🧪 Testing Improvements

• Routes and middleware are tested for status codes, response bodies, CORS headers, and logger context injection.
• Failsafe checks for experimental and status toggling in both routers and middleware are in place.

📚 Documentation

• README expanded with accurate config reference and usage.
• Added a section explicitly explaining how togglable middleware is handled.