docs: a user-local Node route for a standard Mac user, and what the registry checks decide (#1557)

Two fixes from a first-user run on a Mac with fresh accounts.

- **Node.js for a standard Mac user:** someone who isn't an administrator, or whose Homebrew belongs to another account, can install Node.js in their own home folder with nvm. They run `touch ~/.zshrc` first, because a new Mac account has none and nvm's installer only adds itself to a profile file that already exists. Then they run nvm's install command, open a new terminal, and run `nvm install 22`. No administrator password is needed, and `npm install -g` then installs into the nvm folder. This is in `docs/reference/getting-started.md` and the README. Nothing is claimed about Node.js's own installer for a standard user.
- **What the registry checks decide:** `docs/reference/publishing-a-rig-bundle.md` now says that a submission with a taken name is still received, that a team sharing a listed team's `rig.yaml` name (such as an unchanged copy) passes with a maintainer notice, and that listing is the maintainer's review decision, not the checks'. Registry policy is unchanged.

Text only. The registry wording was read against `tools/registry-check.mjs` and `tools/ci/bundle-check.mjs` at the registry's main.

README.md

@@ -20,7 +20,7 @@ Not setting this up today? Get the next walkthrough and occasional OpenRig updat
 
 ## Install and first run
 
-Requires Node.js 22 or 24 and tmux, on macOS or Linux, and one working Claude Code or Codex account: one is enough, since the kernel operator adapts the shipped `starter` team to whichever you have. On Linux, the distribution's own Node.js can be older (Ubuntu 24.04's is 18); install a supported version with [nvm](https://github.com/nvm-sh/nvm) (`nvm install 22`) or NodeSource. On a Mac with Apple silicon, use Node.js 22 ([compatibility history](docs/releases/v0.5.15.md#known-compatibility-limitation)). On Windows, use WSL2, the Windows route OpenRig supports; native Windows isn't supported. OpenRig's automated tests don't run on WSL2 yet; see [one user's working setup](docs/reference/getting-started.md#wsl2-a-reported-working-setup). Launching a rig writes provider hooks and workspace trust settings. Before running the commands below, read [what OpenRig changes on your machine](#what-openrig-changes-on-your-machine) and back up the relevant files.
+Requires Node.js 22 or 24 and tmux, on macOS or Linux, and one working Claude Code or Codex account: one is enough, since the kernel operator adapts the shipped `starter` team to whichever you have. On Linux, the distribution's own Node.js can be older (Ubuntu 24.04's is 18); install a supported version with [nvm](https://github.com/nvm-sh/nvm) (`nvm install 22`) or NodeSource. On a Mac with Apple silicon, use Node.js 22 ([compatibility history](docs/releases/v0.5.15.md#known-compatibility-limitation)). On a Mac where you aren't an administrator, or where Homebrew belongs to another account (its `brew install` is refused), install Node.js in your own home folder with [nvm](https://github.com/nvm-sh/nvm): run `touch ~/.zshrc` (a new Mac account has none, and nvm's installer only adds itself to a profile file that already exists), then the install command on nvm's page, open a new terminal, and run `nvm install 22`. That needs no administrator password, and `npm install -g` then installs into your nvm folder. On Windows, use WSL2, the Windows route OpenRig supports; native Windows isn't supported. OpenRig's automated tests don't run on WSL2 yet; see [one user's working setup](docs/reference/getting-started.md#wsl2-a-reported-working-setup). Launching a rig writes provider hooks and workspace trust settings. Before running the commands below, read [what OpenRig changes on your machine](#what-openrig-changes-on-your-machine) and back up the relevant files.
 
 **One command.** This runs OpenRig's install script from the `v0.6.11` release. It checks Node.js and npm, installs the latest published `@openrig/cli` with `npm install -g`, runs the Node.js and SQLite check, then runs `rig setup --dry-run` and `rig setup`. The first line prints that plan and changes nothing: