add theme feature to README

README.md

@@ -123,6 +123,31 @@ Then edit your environment variables to add it to your PATH.
 ### Nerd Fonts
 The GitKraken CLI supports Nerd Fonts to display icons for some commands. To ensure correct icon rendering, please obtain and install a Nerd Font available at https://www.nerdfonts.com/. After installation, set the selected Nerd Font as the default font for your terminal.
 
+### Themes
+Customize your experience with the theme system. This feature allows you to create custom color schemes and adapt the interface to your preference in both light and dark environments.
+
+#### Creating a custom theme
+1. Navigate to the installation folder
+2. Create a new JSON file inside the ```themes``` folder
+3. Define colors using hexadecimal codes inside the new file. You can see all possible options in the default theme ```gk_theme.json```.
+
+ - There are two possible options to define colors:
+
+    ```
+    "accent": {
+        "dark": "93A9EC",
+        "light": "93A9EC"
+    }
+    ```
+    or
+    
+    ```
+    "accent": "93A9EC"
+    ```
+
+4. Execute ```gk setting --theme NAME_OF_THE_NEW_FILE```
+5. View the changes with ```gk setting theme```
+
 ## Troubleshooting
 
 ### ```gk login``` freezes after authenticating in browser