chore(commitlint): declare the aidd-ui scope, long and short (#423)

`plugins/aidd-ui` ships, but neither `aidd-ui` nor `ui` was in `scope-enum`,
while the six other plugins each declare both forms. A commit touching the
plugin warned on a scope the repo itself defines.

Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>

Author: blafourcade

commitlint.config.cjs

@@ -16,12 +16,14 @@ module.exports = {
         "aidd-pm",
         "aidd-refine",
         "aidd-orchestrator",
+        "aidd-ui",
         "context",
         "dev",
         "vcs",
         "pm",
         "refine",
         "orchestrator",
+        "ui",
         // Root scopes (touching marketplace.json or framework-wide config)
         "framework",
         "marketplace",