Add TypeScript Declarations for Enhanced Type Safety

[Erickinhou]

Description:

This pull request introduces TypeScript declaration files (*.d.ts) to enhance the type safety of the 'react-apple-signin-auth' repository. By providing accurate type information, developers can benefit from improved code autocompletion, better documentation, and early detection of potential type-related errors during development.

• Added TypeScript declaration files for existing and new components, ensuring comprehensive type coverage.
• Added the project's tsconfig.json to include the newly added declaration files.
• Verified that the TypeScript compiler successfully processes the code with the new declaration files.

Additional Notes:

I wanted to know if this will work, I'm doing this because I almost used it in a company, but the fact that it doesn't have types makes it impossible to use.

Please review and provide feedback on the changes. Your input is valuable to ensure the successful integration of TypeScript into the project.

[tony95271]

@a-tokyo request for review

[Erickinhou]

Awesome work!

Please bump the minor version number

Done!