Rename skill to development-branching-strategy

Aligns the skill name with the renamed repository and the development-*
naming used by development-scripts and development-gitops-argo-cd.
Updates the origin-repository and origin-path metadata to match.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

scripts/package.json

@@ -1,7 +1,7 @@
 {
   "name": "branch-tools",
   "version": "0.1.0",
-  "description": "CLI tools for version-aware git branch naming (branching-strategy skill)",
+  "description": "CLI tools for version-aware git branch naming (development-branching-strategy skill)",
   "type": "module",
   "packageManager": "pnpm@9.15.0",
   "bin": {