add markdown include example

example/package.json

@@ -2,6 +2,9 @@
   "name": "example",
   "version": "1.0.0",
   "dependencies": {},
+  "scripts": {
+    "doc": "typedoc --includes src"
+  },
   "devDependencies": {
     "typedoc": "^0.22.13"
   }

example/src/foo.md

@@ -0,0 +1,6 @@
+# Foo
+
+```mermaid
+graph TB
+    A --> B
+```

example/src/foo.ts

@@ -0,0 +1,4 @@
+/**
+ * [[include:foo.md]]
+ */
+export class Foo {}

example/src/index.ts

@@ -1,3 +1,5 @@
+export { Foo } from './foo';
+
 /**
  * Example
  *

package.json

@@ -33,7 +33,7 @@
     "lint": "eslint -c .eslintrc.json --ext ts src && prettier --check './**/*.ts'",
     "build": "rollup -c && prettier --write ./dist/*",
     "test": "jest",
-    "example": "cd example && yarn typedoc"
+    "example": "yarn --cwd example"
   },
   "dependencies": {
     "html-escaper": "^3.0.0"