[Feature Request]: Texture Should Be a Path Reference, Not a Copy #30

Purpose

Currently, when the user selects a texture file, Ember copies it into the project directory. The .ember file stores only the bare filename (no path), and the texture is expected to live alongside the .ember file at runtime.

Under the current design, spritesheet.png would be duplicated into Content\particles\ and maintained separately. This is undesirable when the spritesheet is shared with other systems (Tiled maps, etc.) and changes frequently.

Motivation

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