add full screen and theme (#4436)

Author: Ubayed-Bin-Sufian

documentation/README.md

@@ -102,6 +102,7 @@ The **Main** toolbar is located across the top of the screen. It contains severa
 
 -   **Play Button**: Starts playing the project.
 -   **Stop Button**: Stops the current project playback.
+-   **Fullscreen Button**: Toggles fullscreen mode on or off.
 -   **New Project Button**: Creates a new project from scratch.
 -   **Load Project from File Button**: Opens an existing project file.
 -   **Save Project Button**: Saves the current project.
@@ -117,6 +118,7 @@ The **Secondary** toolbar appears when you click the **hamburger button** (three
 
 -   **Run Slowly**: Executes the program slowly to allow you to follow the process step by step.
 -   **Run Step by Step**: Runs the program one step at a time, ideal for debugging and analysis.
+-   **Change theme**: Switch between light and dark mode for a customized workspace.
 -   **Merge with Current Project**: Combines the current project with another, promoting collaboration and reusability.
 -   **Turtle Wrap**: Enables wrapping of the turtle's position to seamlessly continue from the opposite edge of the canvas.
 -   **Set Pitch Preview**: Lets users preview pitches while composing, providing instant feedback.
@@ -128,7 +130,7 @@ The **Secondary** toolbar appears when you click the **hamburger button** (three
         3. *Delete Plugin*: Allows the removal of plugins that are no longer needed.<br>
         4. *Horizontal Scrolling*: Enables horizontal navigation for easier handling of large projects.<br>
         5. *JavaScript Editor*: Includes an editor for writing and embedding custom JavaScript code.<br>
-        6.*Record*: Adds a "Record" button to the main palette, enabling users to record their compositions directly.
+        6. *Record*: Adds a "Record" button to the main palette, enabling users to record their compositions directly.
 
 -   **Select Language**: Offers a multilingual interface, allowing users to change the language as per their preference.