Add separate Iron Coast mission, weapon and enemy mods with SD HD artwork and audio

examples/mods/iron_coast_turret/prompts/projectile-hd-v1.txt

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+Use case: style-transfer
+Asset type: transparent HD projectile sprite for hostile cannon fire in a top-down military science-fiction shoot-em-up.
+Input: original Raptor ESHOT_BLK 8×8 amber projectile, enlarged nearest-neighbor, is a reference for color and readability.
+Primary request: a single small compact circular amber/orange energy shell viewed directly overhead, bright pale-yellow center fading to orange metal/plasma rim, dark crisp outer edge. Match the naval steel/amber Raptor remaster style. It will be reduced to an 8×8 logical square, so keep a simple readable round footprint and avoid microdetails. This is one ammunition projectile, no weapon or spacecraft.
+Composition: perfectly centered isolated circular sprite on square canvas, visible orb occupies about62% width/height with equal large transparent margins. Keep all glow contained inside the circular orb, no external haze, shadow, trail or rays. Do not stretch it.
+Constraints: true transparent background, no extra objects, no checkerboard or black background baked into pixels, no text, logos, watermarks, perspective or decorative framing.

examples/mods/iron_coast_turret/prompts/unit-hd-v1.txt

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+Use case: style-transfer
+Asset type: transparent HD sprite for Iron Coast armored ground turret in a top-down vertical shoot-em-up.
+Input image: original 24×24 Raptor SHIP37G1_PIC enlarged nearest-neighbor, reference for the compact circular armored emplacement, overhead camera and utilitarian style. Adapt it to a 32×32 logical square canvas.
+Primary request: one HD remaster of a heavy oval/circular ground defense turret. Two parallel recessed cannon ports facing DOWN along the central vertical axis, surrounded by concentric naval steel and dark olive armored plates, small dark red inner gun wells, bolted side plating. Maintain the original compact oval footprint, fully overhead with no visible side walls or horizon; weapons belong to a stationary ground installation, not an aircraft. Restrained amber indicator lights. Readable dark outline and precise industrial panel detail.
+Composition: square canvas, centered, approximately 90% width and 90% height, symmetric and aligned on exact center; keep small equal transparent margins. Gentle top-left illumination, no external shadow. Cannon barrels remain contained within the turret footprint.
+Constraints: single isolated sprite, genuine transparent background, no ground, floor, text, logos, watermark, smoke, muzzle flash, trails, border or checkerboard painted into pixels. No perspective or rotation.