Fix Missing License Terms ID in tokenURI() Function

[kingster-will]

Description

Overview

This pull request addresses the issue where the tokenURI() function in the LicenseToken does not return metadata containing the license terms ID. The fix ensures that the license terms ID is correctly appended to the URI string. Additionally, this PR also adding unit test to verify that the tokenURI() function returns the expected base64-encoded string containing all necessary metadata.

Changes Made

1. Function Update: Modified the tokenURI() function to concatenate the license terms ID to the metadata URI.
2. Unit Test Addition: Added a new unit test in LicenseToken.t.sol to ensure the returned URI is correctly base64 encoded and includes the license terms ID.

Test Plan

• Verify that all tests pass, including the new test for the tokenURI() function.

Related Issue

Closes #135