Doors: Block guard's detection and add light occlusion

Currently a guard can detect the player behind a closed door. And also visually the light pass through it.

XP Summary (total 225)

Subdomain	Skill	XP
Engineering: Gameplay & Systems Programming	Problem Solving	75
Engineering: Gameplay & Systems Programming	Creativity & Design Thinking	75
Engineering: Gameplay & Systems Programming	Technical Literacy	75

I plan to work on this :)

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