Add Documentation for four digit seven segment display

[yrlmanoharreddy]

Description
We need to create comprehensive documentation for the Four-Digit Seven Segment Display component. This will help developers understand how to utilize this component effectively in their projects.

Components to Document

1. Component Description:
   Describe the features of the Four-Digit Seven Segment Display (e.g., displaying numbers, multiplexing control, controlling individual segments, etc.).
2. YAML Configuration:
   Provide the GPIO pin configuration for the Four-Digit Seven Segment Display, including an example YAML file.
3. Circuit Setup Image:
   Create a detailed image of the Four-Digit Seven Segment Display's circuit setup using a breadboard and Raspberry Pi.
4. Schematic Diagram:
   Include a clear schematic diagram of the Four-Digit Seven Segment Display circuit.
5. Usage Instructions:
   • Write instructions for initializing the display, displaying numbers on multiple digits, and controlling individual segments.
   • Include steps for testing with Micronaut and Pi4J.

Acceptance Criteria:

• Component Description - what it can do
• Add yaml configuration
• Circuit setup image
• Schematic diagram
• Instructions on how to use