feat: add NimmerSky modlist foundation

- Visions of Vaermina reference list parsed into sections
- Community Shaders guide with PGPatcher setup
- Body/animation stack documentation
- CSV/ODS tracking spreadsheets

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

sections/Alternate_Perpsective.txt

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++2k - New Alternate Dirt Road
++Alternate Complex Parallax Northern Roads
++Alternate Perspective - Northern Roads Patch
++Higher Poly Stockades For Northern Roads - Tomato's Wood Retexture
++Ivarstead Bridge - A Tiny Northern Roads Edit
++Northern Roads - Floating Objects Fix - Lux Via
++Northern Roads - Floating Objects Fix
++Northern Roads - Landscape and Water Fixes patch
++Northern Roads - Landscape Fix and Improvement
++Northern Roads Tents - Animated
++Northern Concept - Parallax Meshes (Meshes Folder)
++Northern Concept - Northern Roads
++Northern Roads Patch Collection Addons
++Northern Roads - Patches Compendium
++Northern Roads Patch Collection
++ElSopa - Northern Roads Resculpted
++Northern Roads - Collision and Placement Fix
++Northern Roads Whiterun stone texture fix
++Northern Roads - Collision Box Fix in Whiterun
++Northern Roads