Python

To build a Blender addon follow these steps

1. Create a directory for your add-on. Choose a name for the directory that represents your add-on's functionality.

2. Inside the add-on directory, create a Python script with a .py extension. This script will serve as the main entry point for your add-on.

3. Open the Python script in a text editor and write your add-on's code. Make sure to follow Blender's add-on development guidelines and adhere to the required structure and naming conventions.

4. Optionally, create additional Python modules or scripts in the same directory if your add-on requires them.

5. Zip the entire add-on directory, including the main Python script and any additional modules or scripts.

6. Open Blender and go to "Edit" → "Preferences" → "Add-ons".

7. Click on the "Install..." button located at the top right of the Preferences window.

8. Navigate to the zip file of your add-on and select it.

9. Click on "Install Add-on" to install the add-on.

10. Once installed, you should see the add-on listed in the add-ons list. Enable the add-on by checking the checkbox next to its name.

11. Close the Preferences window.

Few Gotchas!!

1. when you are going to install it as a ZIP file you need to have your main python file named as   __init__.py   (This is the file that runs when you install the addon)

2.During development you might need to use external editor so here is how you do that
https://docs.blender.org/api/current/info_tips_and_tricks.html#use-an-external-editor