Merge docs into static-php-cli repo (#492)

* Move docs to here

* Move docs to here

* Modify old docs links

docs/index.md

@@ -0,0 +1,23 @@
+---
+# https://vitepress.dev/reference/default-theme-home-page
+layout: home
+
+hero:
+  name: "static-php-cli"
+  tagline: "Build standalone PHP binary on Linux, macOS, FreeBSD, Windows, with PHP project together, with popular extensions included."
+  actions:
+    - theme: brand
+      text: Get Started
+      link: /en/guide/
+    - theme: alt
+      text: 中文文档
+      link: /zh/
+
+features:
+  - title: Static CLI Binary
+    details: You can easily compile a standalone php binary for general use. Including CLI, FPM sapi.
+  - title: Micro Self-Extracted Executable
+    details: You can compile a self-extracted executable and build with your php source code.
+  - title: Dependency Management
+    details: static-php-cli comes with dependency management and supports installation of different types of PHP extensions.
+---