RFD 1120: Split apps/ into their own repos
Problem
weftspun-3d-studio held three independently deployed apps (weftspun_studio, character_taxonomy, usd_viewer_app) under one apps/ directory (RFD 1076), plus a large vendored browser client and a companion APK under thirdparty/. A monorepo checkout, one scripts/ci.sh building all three, and one shared self-hosted deploy script no longer matched three apps with three separate Fly deploy targets and no code sharing between them.
Decision
Each app moved to its own repository, with history preserved by git subtree split --prefix=apps/<app>, then pushed as that repo’s main: weftspun/weftspun-studio, weftspun/weftspun-character-taxonomy, and weftspun/weftspun-usd-viewer. apps/, scripts/ci.sh, and scripts/studio-test.sh were removed from weftspun-3d-studio, since none apply to a repo with no app code left. deploy/, .github/workflows/deploy-fly.yml, and scripts/deploy-weftspun-quadlet.sh moved into weftspun-studio, the one app that requires the other two reachable. thirdparty/3d_studio/ and thirdparty/android-xr-face-bridge/ moved to weftspun-3d-studio’s own repo root, leaving that repo the browser client and the companion APK only.
See DETAILS.md for the exact path changes, the new /opt/weftspun/<repo>/ deploy convention, and open follow-up work.