Add Method to initiate the reset password mechanism

[Nerzal]

Is your feature request related to a problem? Please describe.
The problem is easy. It's a missing feature.

Describe the solution you'd like
As described here we can trigger the "reset password" mechanism by calling the given URL.

Rather than specifying a new password manually a better security practice is to use the PUT /admin/realms/{realm}/users/{id}/execute-actions-email admin call with "UPDATE_PASSWORD" as the required action. This causes Keycloak to send an email to the user that gives a link for the user to set a new password.

Documentation:
https://www.keycloak.org/docs-api/4.8/rest-api/index.html#_users_resource