Added documentation for creating a new RAM Launcher

docs/creating_new_RAM_launcher.md

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+# Creating a new RAM launcher
+
+This guide outlines the steps involved in creating a new RAM launcher. 
+
+For the `launch_world` transition, which transitions the application from the connected state to the world_ready state, the file executed is `launcher_world.py`, and for the `prepare_visualization` transition, the file executed is `launcher_visualization.py`.
+
+To create a new RAM launcher for the `prepare_visualization` transition, follow these steps:
+
+1. Define the New Visualization Configuration
+
+First, add a new entry to the `visualization` dictionary in `launcher_visualization.py`. Let's call this new entry `custom_visualization` and assume it uses two modules: `abc_module` and `xyz_module`.
+
+```python
+visualization = {
+    # Existing configurations...
+    "custom_visualization": [
+        {
+            "type": "module",
+            "module": "abc_module",
+            "display": ":1",
+            "external_port": 1200,
+            "internal_port": 6000,
+        },
+        {
+            "type": "module",
+            "width": 1280,
+            "height": 720,
+            "module": "xyz_module",
+            "display": ":2",
+            "external_port": 1300,
+            "internal_port": 6001,
+        },
+    ],
+}
+```
+
+2. Implement the Required Modules
+
+Next, ensure that the modules specified in your new visualization setup (`abc_module` and `xyz_module`) are implemented and available for import.
+
+- For `abc_module`:
+Create a file named `launcher_abc_module.py` and implement the `LauncherAbcModule` class.
+
+- For `xyz_module`:
+Create a file named `launcher_xyz_module.py` and implement the `LauncherXyzModule` class.
+
+3. Using the New Visualization Setup
+
+Now, you can create an instance of `LauncherVisualization` with the new visualization setup and run it.
+
+To create a new RAM launcher for `launch_world` transition, follow similar steps as above by adding a new entry to the `worlds` dictionary in the `launcher_world.py` file.