feat: add NPX installer CLI (install/list/uninstall)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

package.json

@@ -0,0 +1,12 @@
+{
+  "name": "master-skill",
+  "version": "0.3.0",
+  "description": "Chinese Buddhist Master AI Skills — RAG-grounded, source-cited, fidelity-tested",
+  "bin": {
+    "master-skill": "./bin/cli.mjs"
+  },
+  "keywords": ["claude-skills", "agent-skills", "buddhism", "ai-persona", "rag", "digital-humanities"],
+  "license": "MIT",
+  "repository": {"type": "git", "url": "https://github.com/xr843/Master-skill"},
+  "files": ["bin/", "prebuilt/", "scripts/"]
+}