feat(DevRoom): add HUD prefab and DevRoomHUD script for controls display

Assets/Level/Prefabs/Dev/HUD.prefab

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+  m_LocalPosition: {x: 2.44109, y: 0.05, z: 2.28609}
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+  labelColor: {r: 1, g: 1, b: 1, a: 1}

Assets/Level/Prefabs/Dev/HUD.prefab.meta

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