Add Art Kit painting upgrades

items/icons/placeholder/art_kit.svg

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+<svg xmlns="http://www.w3.org/2000/svg" width="64" height="64" viewBox="0 0 64 64">
+  <rect x="7" y="10" width="50" height="44" rx="12" fill="#35b9c7"/>
+  <rect x="12" y="15" width="40" height="34" rx="9" fill="#0d2c3a"/>
+  <circle cx="23" cy="27" r="6" fill="#f5eed9"/>
+  <circle cx="39" cy="27" r="6" fill="#ef5b62"/>
+  <path d="M18 42L30 33L35 38L46 30L50 42Z" fill="#ffd166"/>
+</svg>

items/icons/placeholder/art_kit.svg.import

@@ -0,0 +1,43 @@
+[remap]
+
+importer="texture"
+type="CompressedTexture2D"
+uid="uid://bm0kkevv62mu0"
+path="res://.godot/imported/art_kit.svg-d4bd09e1da2e2339f7d505ee23d771f8.ctex"
+metadata={
+"vram_texture": false
+}
+
+[deps]
+
+source_file="res://items/icons/placeholder/art_kit.svg"
+dest_files=["res://.godot/imported/art_kit.svg-d4bd09e1da2e2339f7d505ee23d771f8.ctex"]
+
+[params]
+
+compress/mode=0
+compress/high_quality=false
+compress/lossy_quality=0.7
+compress/uastc_level=0
+compress/rdo_quality_loss=0.0
+compress/hdr_compression=1
+compress/normal_map=0
+compress/channel_pack=0
+mipmaps/generate=false
+mipmaps/limit=-1
+roughness/mode=0
+roughness/src_normal=""
+process/channel_remap/red=0
+process/channel_remap/green=1
+process/channel_remap/blue=2
+process/channel_remap/alpha=3
+process/fix_alpha_border=true
+process/premult_alpha=false
+process/normal_map_invert_y=false
+process/hdr_as_srgb=false
+process/hdr_clamp_exposure=false
+process/size_limit=0
+detect_3d/compress_to=1
+svg/scale=1.0
+editor/scale_with_editor_scale=false
+editor/convert_colors_with_editor_theme=false