games/xjewel: Mark DEPRECATED

• Unmaintained as last release was in 1994
• Unclear licensing terms; original author unreachable
• Set EXPIRATION_DATE 2025-05-01

This software was last updated in 1994 and lacks a clear license
declaration. The original author is named but unreachable, and no
explicit permissions are provided.
As a result, the code is considered legally ambiguous and is not safe to
include in a redistributable ports collection.

This port is not up for adoption due to licensing uncertainty.