[DOC] add developer guide to read file fpr contributers

[s0hei1]

[Description]

Add a Developer Guide section to the README file to help new contributors get started with the project. The guide includes setup instructions, coding standards, contribution workflow, and testing guidelines.

Details:

• Added instructions for setting up the development environment
• Documented project structure and key components
• Provided guidelines for submitting pull requests
• Included steps for running tests locally