Initial import: SharePoint Lists skill

Claude Code skill for SharePoint Lists CRUD via Microsoft Graph (app-only auth): reusable graph.mjs client, sp.mjs CLI, and setup + API reference docs.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

.gitignore

@@ -0,0 +1,15 @@
+# --- Secrets: never commit ---
+.env
+*.env
+*.env.local
+!.env.example
+
+# --- Node ---
+node_modules/
+npm-debug.log*
+
+# --- OS / editor cruft ---
+.DS_Store
+*.swp
+.idea/
+.vscode/