feat(cli): add toolchain management command

readme.md

@@ -57,6 +57,7 @@ gitzone release
 | `format` | Plan or apply project formatting and standardization |
 | `config` | Inspect, update, and migrate `.smartconfig.json` |
 | `services` | Manage local MongoDB, MinIO, and Elasticsearch containers |
+| `tools` | Manage the global `@git.zone` toolchain |
 | `template` | Scaffold projects from built-in templates |
 | `meta` | Manage multi-repository workspaces |
 | `open` | Open repository assets like CI pages |
@@ -67,6 +68,23 @@ gitzone release
 
 Global flags include `--help`, `--json`, `--plain`, `--agent`, `--no-interactive`, and `--no-check-updates`.
 
+## Toolchain Management
+
+`gitzone tools` replaces the former `gtools` command from `@git.zone/tools`. It manages globally installed `@git.zone` development tools through pnpm.
+
+```bash
+# Check installed @git.zone tools and update outdated packages
+gitzone tools update
+
+# Update without prompts
+gitzone tools update -y
+
+# Install missing managed @git.zone tools
+gitzone tools install
+```
+
+`gitzone tools update` checks `@git.zone/cli` first. If the CLI itself needs an update, it updates `@git.zone/cli` and asks you to rerun the command before updating the rest of the toolchain.
+
 ## Commit Workflow
 
 `gitzone commit` creates one semantic source commit. It does not bump versions, create tags, publish packages, or push Docker images.