Add Cinematic End Entrance Animation on First Arrival

1. Core Suggestion
I propose adding a real-time rendered entrance animation (approximately 5–8 seconds) when a player first travels through the End portal, replacing the current abrupt "black screen → standing on the obsidian platform" transition.

2. Implementation Ideas

• Visual Design : The camera (first-person or third-person) sweeps through swirling violet nebula clouds. In the distance, the Ender Dragon is seen circling slowly, with a low, echoing roar. The camera then rapidly descends, focusing on the player's feet landing on the obsidian platform, at which point the surrounding End Crystals light up one by one.

• Interaction Control : Players can freely move their camera view during the animation (similar to The Legend of Zelda's cutscenes), but character movement is locked. A 0.5-second invincibility window should be granted immediately after the animation ends, preventing unfair damage from the dragon.

• Trigger Condition : This animation should play only on the player's first entry into the End. Re-entries after death or via the return gateway should skip it to respect time.

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