doc: add new site for doc

docs/en/index.md

@@ -0,0 +1,36 @@
+---
+# https://vitepress.dev/reference/default-theme-home-page
+layout: home
+
+hero:
+  name: "Lancet"
+  text: "A powerful util function library of Go"
+  tagline: Simple, powerful, and efficient.
+  actions:
+    - theme: brand
+      text: Get Started
+      link: /en/guide/getting_started
+    - theme: alt
+      text: View on GitHub
+      link: https://github.com/duke-git/lancet
+    # - theme: alt
+    #   text: API Examples
+    #   link: /api-examples
+  image:
+    src: /lancet_logo.png
+    alt: lancet
+
+features:
+  - title: Powerful
+    icon: 💪
+    details: support 600+ go util functions. eg. string, slice, datetime, net, crypto, concurrency...
+  - title: Modular by design
+    icon: 🏗
+    details: Each module is designed as a package with no coupling between modules.
+  - title: Pure
+    icon: 💅
+    details: Only depends on two kinds of libraries, go standard library and golang.org/x.
+  - title: Simple
+    icon: 👏
+    details: Well structure, test for every exported function.
+---