add README with project overview, features, and installation instructions

Author: hasib-devs

README.md

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+# Hono Routing Controllers
+
+[![License: MIT](https://img.shields.io/badge/License-MIT-blue.svg)](https://opensource.org/licenses/MIT)
+
+A TypeScript-based decorator-driven routing solution for Hono.js, inspired by `routing-controllers`, featuring dependency injection and middleware support.
+
+## Features
+
+- 🎯 Decorator-based route definitions (`@Controller`, `@Get`, `@Post`, etc.)
+- 💉 Custom dependency injection container
+- 🛡️ Middleware support
+- 📜 TypeScript-first approach
+- 🔌 External Hono instance integration
+
+## Installation
+
+```bash
+npm install hono-routing-controllers