Prepare CLI for move into mainline

packages/cli/docs/src/plugin/interface/network.md

@@ -0,0 +1,34 @@
+# Network Functions
+
+> you can use Network functions to download & read some data from internet
+
+### download_file(url: string, path: string) -> boolean
+
+This function can help you download some file from url, and it will return a *boolean* value to check the download status. (true: success | false: fail)
+
+You need pass a target url and a local path (where you want to save this file)
+
+```lua
+-- this file will download to plugin temp directory
+local status = plugin.network.download_file(
+    "http://xxx.com/xxx.zip",
+    plugin.dirs.temp_dir()
+)
+if status != true then
+    log.error("Download Failed")
+end
+```
+
+### clone_repo(url: string, path: string) -> boolean
+
+This function can help you use `git clone` command (this system must have been installed git)
+
+```lua
+local status = plugin.network.clone_repo(
+    "http://github.com/mrxiaozhuox/dioxus-starter",
+    plugin.dirs.bin_dir()
+)
+if status != true then
+    log.error("Clone Failed")
+end
+```