Added JFDuke3D, Duke Nukem 3D source port for smaller Pis#3803

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protocultor wants to merge 5 commits intoRetroPie:masterfrom protocultor:jfduke3d

+178-11

Commits on Nov 13, 2023

Commits on Nov 14, 2023

Added jfsw, Shadow Warrior source port by JonoF
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Commits on Nov 19, 2023

jfsw.sh now depends directly on 3fduke3d.sh
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Commits on Nov 24, 2023

Only one place to obtain Duke3D shareware
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