Add Bind Usage to README

[KyleMcMaster]

This pull request adds new documentation to the README.md explaining how to use the Bind and BindAsync methods to chain together multiple Result<T> operations. This helps developers write more concise and maintainable code by eliminating repetitive success checks after each operation.

Enhancements to documentation:

• Added a new section, "Chaining Result Operations with Bind and BindAsync", which explains how to use the Bind and BindAsync methods to chain operations that return Result<T>, including before-and-after code examples and an explanation of how failure propagation works.