Hello LiZulu, and thank you for posting.
I agree with MondRubberduck with the idea of using a 2D software to get the fine straight lines. Especially if you are using photoshop, you can use the line tool or rectangle tool (which I believe most 2D art programs have) to make straight lines. Then, I’d export as a png, import to UE5, create a material and apply it to a plane. You could make it into a decal instead. Here is some information on decals if its of any interest.
I hope our solutions assist you.