Add AI documentation skills

.ai/skills/mkdocs/references/upstream/mkdocs-material-9.7.1-docs/schema/extensions.json

@@ -0,0 +1,42 @@
+{
+  "$schema": "https://json-schema.org/draft-07/schema",
+  "title": "Markdown extensions",
+  "markdownDescription": "https://squidfunk.github.io/mkdocs-material/setup/extensions/",
+  "type": "array",
+  "items": {
+    "anyOf": [
+      {
+        "$ref": "#/$defs/external"
+      },
+      {
+        "$ref": "#/$defs/external-community"
+      }
+    ]
+  },
+  "uniqueItems": true,
+  "minItems": 1,
+  "$defs": {
+    "external": {
+      "description": "External markdown extensions, schema provided by us",
+      "anyOf": [
+        {
+          "$ref": "extensions/markdown.json"
+        },
+        {
+          "$ref": "extensions/pymdownx.json"
+        }
+      ]
+    },
+    "external-community": {
+      "description": "External markdown extensions, schema provided by our community",
+      "anyOf": [
+        {
+          "$ref": "https://raw.githubusercontent.com/Neoteroi/mkdocs-plugins/main/docs/extensions-schema.json"
+        },
+        {
+          "$ref": "https://raw.githubusercontent.com/mikitex70/plantuml-markdown/master/plantuml_markdown.json"
+        }
+      ]
+    }
+  }
+}