chore: scaffold repository and record 0.1.0 setup state

Create Game/, Art/, Geo/, Tools/, Docs/ with LFS and ignore rules, record the
workstation audit, toolchain pins, setup checklist, release checks, and
licensing policy. ROADMAP 0.1.0 environment tasks marked to match verified state.

.gitattributes

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+# Text normalisation
+* text=auto eol=lf
+*.bat text eol=crlf
+*.cmd text eol=crlf
+*.sh text eol=lf
+*.md text eol=lf
+*.json text eol=lf
+*.uproject text eol=lf
+*.cs text eol=lf
+*.ini text eol=lf
+
+# Unreal content and binaries — Git LFS
+*.uasset filter=lfs diff=lfs merge=lfs -text
+*.umap filter=lfs diff=lfs merge=lfs -text lockable
+*.ubulk filter=lfs diff=lfs merge=lfs -text
+*.uexp filter=lfs diff=lfs merge=lfs -text
+*.upk filter=lfs diff=lfs merge=lfs -text
+
+# Blender sources — Git LFS, lockable
+*.blend filter=lfs diff=lfs merge=lfs -text lockable
+*.blend1 filter=lfs diff=lfs merge=lfs -text
+
+# Interchange and asset formats
+*.fbx filter=lfs diff=lfs merge=lfs -text
+*.obj filter=lfs diff=lfs merge=lfs -text
+*.usd filter=lfs diff=lfs merge=lfs -text
+*.usdz filter=lfs diff=lfs merge=lfs -text
+*.glb filter=lfs diff=lfs merge=lfs -text
+
+# Textures
+*.png filter=lfs diff=lfs merge=lfs -text
+*.jpg filter=lfs diff=lfs merge=lfs -text
+*.jpeg filter=lfs diff=lfs merge=lfs -text
+*.tga filter=lfs diff=lfs merge=lfs -text
+*.tif filter=lfs diff=lfs merge=lfs -text
+*.tiff filter=lfs diff=lfs merge=lfs -text
+*.psd filter=lfs diff=lfs merge=lfs -text
+*.exr filter=lfs diff=lfs merge=lfs -text
+*.hdr filter=lfs diff=lfs merge=lfs -text
+*.dds filter=lfs diff=lfs merge=lfs -text
+
+# Audio and video
+*.wav filter=lfs diff=lfs merge=lfs -text
+*.flac filter=lfs diff=lfs merge=lfs -text
+*.ogg filter=lfs diff=lfs merge=lfs -text
+*.mp3 filter=lfs diff=lfs merge=lfs -text
+*.mp4 filter=lfs diff=lfs merge=lfs -text
+*.mov filter=lfs diff=lfs merge=lfs -text
+
+# Geographic sources
+*.osm.pbf filter=lfs diff=lfs merge=lfs -text
+*.pbf filter=lfs diff=lfs merge=lfs -text
+*.gpkg filter=lfs diff=lfs merge=lfs -text
+*.shp filter=lfs diff=lfs merge=lfs -text
+*.shx filter=lfs diff=lfs merge=lfs -text
+*.dbf filter=lfs diff=lfs merge=lfs -text
+*.las filter=lfs diff=lfs merge=lfs -text
+*.laz filter=lfs diff=lfs merge=lfs -text
+*.dem filter=lfs diff=lfs merge=lfs -text
+
+# Archives
+*.zip filter=lfs diff=lfs merge=lfs -text
+*.7z filter=lfs diff=lfs merge=lfs -text
+*.tar.gz filter=lfs diff=lfs merge=lfs -text