Add Documentation for 7 Segment Display

[yrlmanoharreddy]

Description:

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

**Developer Notes : **

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