Add in video capture script to capture loadout features

[srsholmes]

Figure out how to add them to the readme.

[srsholmes]

Parked as an experiment. Built video-capture tooling (scripts/capture-videos.ts: CDP screencast → captioned animated WebP, opt-in per-plugin plugins/<id>/tour.json, review→--promote flow, plus a Steam Big Picture mode) and captioned demos for 19 plugins — see PR #210 (closed) on branch feat/plugin-tour-videos. Decision: the videos don't look good enough in this format to embed in the README right now. Revisit later. Note: animated WebP of game-art library grids is inherently heavy (5–22 MB before tuning); a hosted-video/LFS or different presentation may be worth exploring next time.