Set up bilingual Felis documentation site

package.json

@@ -0,0 +1,19 @@
+{
+  "name": "felis-docs",
+  "private": true,
+  "type": "module",
+  "packageManager": "[email protected]",
+  "scripts": {
+    "docs:dev": "vitepress dev docs --host 127.0.0.1",
+    "docs:build": "vitepress build docs",
+    "docs:preview": "vitepress preview docs --host 127.0.0.1"
+  },
+  "devDependencies": {
+    "@nolebase/vitepress-plugin-enhanced-readabilities": "2.18.2",
+    "@nolebase/vitepress-plugin-highlight-targeted-heading": "2.18.2",
+    "mermaid": "11.17.2",
+    "vitepress": "1.6.4",
+    "vitepress-plugin-mermaid": "2.0.17",
+    "vue": "^3.5.43"
+  }
+}