Improve README with detailed examples and instructions

[CasP0]

Update README.md to include detailed installation, usage, and development instructions.

• Table of Contents

  • Add a table of contents at the beginning of the file.

• Introduction

  • Add an introduction section describing the library.

• Installation

  • Add instructions for installing the library using npm and yarn.

• Usage

  • Add detailed usage examples, including traversing different types of trees and using various functions provided by the library.

• API Reference

  • Add a section with brief descriptions of each function provided by the library, along with their parameters and return values.

• Examples

  • Add examples of using the library with real-world data structures, such as JSON objects and DOM trees.
  • Add examples of custom traversal strategies and how to create custom walkers.

• Development

  • Add information on setting up the development environment, including necessary dependencies and tools.
  • Add a section on running tests and building the project, referencing the relevant scripts in the package.json file.

• License

  • Add a section stating that the project is licensed under the MIT License.

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