Add detailed instructions for running API Dash-generated code in Kotlin using okhttp3

doc/user_guide/instructions_to_run_generated_code.md

@@ -98,8 +98,46 @@ TODO
 TODO
 
 ## Kotlin (okhttp3)
+Here are the detailed instructions for running the generated API Dash code in Kotlin (using okhttp3) for macOS, Windows, and Linux:
+
+### 1. Install Kotlin:
+To run Kotlin code, you need to install Kotlin first. You can install Kotlin from the official Kotlin website:
+
+- Go to [Kotlin Installation Guide](https://kotlinlang.org/docs/getting-started.html#install-kotlin) for detailed steps.
+- Remember: `Kotlin is included in each IntelliJ IDEA and Android Studio release. Download and install one of these IDEs to start using Kotlin`. 
+
+Once Kotlin is installed, proceed with adding `okhttp` and running the generated code.
+
+### 2. Add `okhttp` library:
+To use `okhttp3` in your Kotlin project, you need to include it as a dependency. If you're using **Gradle**, follow these steps:
+
+- Open the `build.gradle` file in your project.
+- Add the following dependency in the `dependencies` section:
+
+```gradle
+implementation("com.squareup.okhttp3:okhttp:4.12.0")
+```
+
+- Sync your project to apply the dependency.
+
+### 3. Execute the generated code:
+After setting up Kotlin and `okhttp3`, follow these steps to run the generated code:
+
+1. **Open your IDE** ✍️ (like Android Studio).
+2. **Create a new Kotlin file** 📝 (or use an existing one).
+3. **Copy the generated code** 📋 from API Dash.
+4. **Paste the code** into the Kotlin file 🔄.
+5. **Run the Kotlin file** by clicking the "Run" button in your IDE or by using the command line.
+
+#### If you're running from the command line:
+1. **Navigate to the project directory** using the terminal or command prompt.
+2. **Compile and run the Kotlin file** with these commands:
+
+```bash
+kotlinc api_test.kt -include-runtime -d api_test.jar
+java -jar api_test.jar
+```
 
-TODO
 
 ## PHP (curl)