Add 'change password' button and function

[mooreds]

Changing a password is part of the login flow. We should add a button/function to do this. It will redirect the user over to FusionAuth and then, on successful change, send them back to the app.

[JakeLo123]

On the SDK side this would be pretty easy!

• Add a method that redirects to FusionAuth
• Maybe some handling after password change… not sure what that would look like without knowing more about the flow.

BUT, let's please consider these SDK-adjacent tasks if we go ahead with this.

• Update the FusionAuth kickstart config in example-app / quickstart to support password changing -- (it does not at the moment)
• Add needed endpoints to example-app, and include them in server code requirements
• Add needed endpoints to FA hosted endpoints that the SDK supports.

Those are necessary to get parity with the logout/login/register flows.