fix(plugin): add renames map so template@stijnvanhulle migrates to toolkit (#175)

PR #160 renamed the marketplace plugin from `template` to `toolkit` without
a `renames` entry. Per the Claude Code marketplace spec, renaming a plugin's
`name` (or removing it from `plugins`) without a top-level `renames` map
strands existing users: their `enabledPlugins` still reference the old
`template@stijnvanhulle` key, which no longer resolves, and a fresh
`/plugin install toolkit@stijnvanhulle` against a pre-rename cache reports
`Plugin "toolkit" not found in marketplace "stijnvanhulle"`.

Map `template` -> `toolkit` so Claude Code (v2.1.193+) auto-migrates the old
key on load instead of erroring.


Claude-Session: https://claude.ai/code/session_01JWMyC4GKPUPo2rCYvDQWGZ

Co-authored-by: Stijn Van Hulle <stijn.vanhulle@gmail.com>
Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>

Author: 3 people

.claude-plugin/marketplace.json

@@ -14,5 +14,8 @@
       "source": "./tools/claude",
       "description": "Spec-driven workflow, writing-voice skills, code-reviewer agent, and shared TypeScript-monorepo conventions."
     }
-  ]
+  ],
+  "renames": {
+    "template": "toolkit"
+  }
 }