Build Asset Studio M1 canonical product asset package

Nick asked in Slack DM thread 1780100225.058069 to build the first milestone for Linear project Edges — Asset Studio. Scope is explicitly expanded by Nick for this project beyond normal Web-Dave www/docs guardrail to include apps/www, apps/edges, and a new package. First milestone is M1 — Canonical product asset package: ALL-1300 scaffold @texturehq/edges-product-assets, ALL-1299 manifest types/taxonomy/capabilities, ALL-1298 port relevant apps/www composer asset-registry entries + static files, ALL-1297 validation + JSON manifest generation, ALL-1296 update apps/www composer asset view to consume the new package. Worktree: /home/agent/agents/web-dave/worktrees/asset-studio-m1. Branch: website/asset-studio-m1.