Remove some references to RID internally and use uid instead. Also fix Area issue. #822

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📊 Static checks / Clippy 3D	1m 2s
📊 Static checks / Clippy 2D	1m 4s
Godot / 2d single simd-parallel	7s
📊 Static checks / Format Code	14s
Godot / 2d single enhanced-determinism	4s
🧪 Run Tests / Run Tests	5m 20s
Godot / 3d single simd-parallel	7s
🧪 Run Tests / Run Tests	5m 20s
Godot / 3d single enhanced-determinism	7s
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🍎 macOS	0s
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