Add code examples for basic operations in README.md

[rtb-12]

We need to enhance the project's README.md file by including simple primitive methods like Read,Write,Keys,Erase,Put examples for basic operations. This will make it easier for new users and contributors to understand and utilize the project.

Tasks

• Add a Read Example to the README.
• Add a Write Example to the README.
• Add a Delete Example to the README.
• Add a Keys Listing Example to the README.

Additional Notes

• Ensure examples are concise and beginner-friendly.
• Use comments in the code snippets to explain each step.
• Validate the examples to confirm they work with the current implementation of the project. Add them to an examples directory