add setPassword method for updating user passwords

[MonishK2002]

Description
This PR introduces a new method setPassword to the Casdoor Java SDK, enhancing the SDK's functionality by enabling the capability to set or change a user's password programmatically.

Reason for Update
Adding the setPassword API to the Casdoor Java SDK provides users with the ability to update passwords directly through the SDK, improving security management and user experience.

Changes Made

1. Implemented the setPassword method in the Casdoor Java SDK.
2. Added a Javadoc comment to explain the method's functionality.
3. Included appropriate logging for success and error scenarios.
4. Ensured the code is optimized and adheres to best practices.

Testing

1. Verified that the setPassword method works correctly with valid inputs.
2. Tested the method with and without the oldPassword parameter to ensure flexibility.
3. Ran existing tests to ensure no other functionality is broken by the update.

Impact
This update allows users of the Casdoor Java SDK to utilize the setPassword API, facilitating better user management within their applications. No existing functionality is affected by this update.

[CLAassistant]

Thank you for your submission! We really appreciate it. Like many open source projects, we ask that you all sign our Contributor License Agreement before we can accept your contribution.
1 out of 2 committers have signed the CLA.

✅ MonishK2002
❌ Monish

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[hsluoyz]

Replaced by: #101