feat(casan): add native plugin facade

.claude-plugin/marketplace.json

@@ -0,0 +1,37 @@
+{
+  "name": "casan",
+  "owner": {
+    "name": "CASAN Team"
+  },
+  "metadata": {
+    "description": "Native operator facade for the CASAN governed AI coding assurance runtime"
+  },
+  "plugins": [
+    {
+      "name": "casan",
+      "source": "./",
+      "description": "Adopt, diagnose, verify, and operate CASAN from Claude Code without bypassing project-local hook trust or runtime integrity controls.",
+      "version": "1.0.7",
+      "author": {
+        "name": "CASAN Team"
+      },
+      "license": "Proprietary",
+      "keywords": [
+        "agentic-coding",
+        "assurance",
+        "governance",
+        "security",
+        "audit"
+      ],
+      "category": "workflow",
+      "tags": [
+        "agentic-coding",
+        "assurance",
+        "governance",
+        "security",
+        "audit"
+      ],
+      "strict": true
+    }
+  ]
+}

.claude-plugin/plugin.json

@@ -0,0 +1,20 @@
+{
+  "name": "casan",
+  "version": "1.0.7",
+  "description": "Native Claude Code operator facade for the CASAN governed AI coding assurance runtime.",
+  "author": {
+    "name": "CASAN Team"
+  },
+  "license": "Proprietary",
+  "keywords": [
+    "claude-code",
+    "agentic-coding",
+    "assurance",
+    "governance",
+    "security",
+    "audit"
+  ],
+  "skills": [
+    "./skills/"
+  ]
+}