Add README for Mediator Pattern

08_Mediator/README.md

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+# 🔄 Mediator Pattern
+
+## 📌 What is the Mediator Pattern?
+
+The **Mediator Pattern** defines an object (**Mediator**) that encapsulates how a set of objects (**Colleagues**) interact with each other. Instead of objects communicating **directly**, they interact **through the mediator**, reducing dependencies between them. 🔄
+
+This pattern promotes **loose coupling** by centralizing communication logic in a single place. 🏗️
+
+## 🛠️ Key Concepts:
+
+1. **Mediator** → Defines communication rules between objects.
+2. **Concrete Mediator** → Manages object interactions.
+3. **Colleagues** → Objects that rely on the mediator to communicate.
+
+## 🔥 When to Use?
+
+✅ When multiple objects interact **frequently**, causing a **complex dependency graph**.  
+✅ When you want to **centralize communication logic** and **reduce coupling**.  
+✅ When you need to simplify **event-driven interactions**.
+
+## 🎯 Real-World Examples:
+
+- **Chat Rooms**: Users communicate via a chat server 💬
+- **Air Traffic Control**: Pilots communicate through a control tower ✈️
+- **UI Components**: Buttons, forms, and dialogs interact via a central manager 🎛️
+
+---
+
+🔗 **Example Code:** [See Implementation](./mediator.ts)

README.md

@@ -71,3 +71,4 @@ These patterns focus on object creation mechanisms to increase flexibility and r
 | **Template Method** | [📜 README](05_Template_Method/README.md) |
 | **Command**         | [📜 README](06_Command/README.md)         |
 | **Observer**        | [📜 README](07_Observer/README.md)        |
+| **Mediator**        | [📜 README](08_Mediator/README.md)        |