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)

package-lock.json

@@ -1,11 +1,11 @@
 {
-  "name": "get-shit-done-cc",
+  "name": "get-shit-done-redux",
   "version": "1.50.0-canary.0",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
-      "name": "get-shit-done-cc",
+      "name": "get-shit-done-redux",
       "version": "1.50.0-canary.0",
       "license": "MIT",
       "dependencies": {
@@ -13,7 +13,7 @@
         "ws": "8.20.1"
       },
       "bin": {
-        "get-shit-done-cc": "bin/install.js",
+        "get-shit-done-redux": "bin/install.js",
         "gsd-sdk": "bin/gsd-sdk.js",
         "gsd-tools": "bin/gsd-sdk.js"
       },