Create a hyper-realistic 3D rig of Captain America from Avengers: Endgame in an A-pose. The model should feature his detailed, battle-worn suit with the iconic star emblem, scaled chest armor, and realistic materials. Include his visibly damaged shield strapped to his back. Ensure accurate proportions, clean topology, and subtle weathering for authenticity. Optimize the rig for game engines and cinematic renders, delivering a fully articulated, professional-quality result ready for animation.