add sponsorship button

[askdkc]

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[what-the-diff]

PR Summary

• Introduction of Sponsorship Features
  The addition of a "Sponsor" badge and a corresponding link allows users to make financial contributions if they wish to support the project directly. This establishes a clear channel for sponsorship.

• Incorporating Ko-fi Platform
  We have also integrated the Ko-fi platform into our project. A Ko-fi badge along with a supportive link has been added. This offers another method to financially support the ongoing development and maintenance of the project.