chore: rebrand to GSD-redux/get-shit-done-redux

Mirror of code, issues, and PRs from the upstream gsd-build/get-shit-done,
which appears compromised or abandoned (maintainer unreachable since
2026-04-01; $GSD token linked to rug-pull).

- Adds rebrand notice block at top of English README
- Removes $GSD token badge and @gsd_foundation X badge (keeps Discord)
- Renames npm packages: get-shit-done-cc -> get-shit-done-redux,
  @gsd-build/sdk -> @gsd-redux/sdk
- Updates all repo URLs across docs, workflows, package.json, bin/
- Updates ci@gsd-build -> ci@gsd-redux in workflow git identities
- Leaves CHANGELOG and .changeset/* alone (historical, time-stamped)

agents/gsd-intel-updater.md

@@ -59,11 +59,11 @@ The /gsd:map-codebase --query command has already confirmed that intel.enabled i
 
 <!-- Layout detection: only meaningful when analysing the GSD framework's own repo (#3290). -->
 
-**Runtime layout detection (GSD framework repo only):** If `package.json` `"name"` equals `"get-shit-done-cc"`, this project IS the GSD framework. In that case, detect the runtime root to choose canonical paths:
+**Runtime layout detection (GSD framework repo only):** If `package.json` `"name"` equals `"get-shit-done-redux"`, this project IS the GSD framework. In that case, detect the runtime root to choose canonical paths:
 
 ```bash
 # Only run layout detection when analysing the GSD framework repo itself.
-if [[ "$(jq -r '.name // ""' package.json 2>/dev/null)" == "get-shit-done-cc" ]]; then
+if [[ "$(jq -r '.name // ""' package.json 2>/dev/null)" == "get-shit-done-redux" ]]; then
   ls -d .kilo 2>/dev/null && echo "kilo" || (ls -d .claude/get-shit-done 2>/dev/null && echo "claude") || echo "unknown"
 fi
 ```