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)

sdk/package.json

@@ -1,5 +1,5 @@
 {
-  "name": "@gsd-build/sdk",
+  "name": "@gsd-redux/sdk",
   "version": "1.50.0-canary.0",
   "description": "GSD SDK — programmatic interface for running GSD plans via the Agent SDK",
   "type": "module",
@@ -21,12 +21,12 @@
   ],
   "repository": {
     "type": "git",
-    "url": "git+https://github.com/gsd-build/get-shit-done.git",
+    "url": "git+https://github.com/GSD-redux/get-shit-done-redux.git",
     "directory": "sdk"
   },
-  "homepage": "https://github.com/gsd-build/get-shit-done/tree/main/sdk",
+  "homepage": "https://github.com/GSD-redux/get-shit-done-redux/tree/main/sdk",
   "bugs": {
-    "url": "https://github.com/gsd-build/get-shit-done/issues"
+    "url": "https://github.com/GSD-redux/get-shit-done-redux/issues"
   },
   "author": "TÂCHES",
   "license": "MIT",