Prepare CLI for move into mainline

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

@@ -0,0 +1,35 @@
+# Path Functions
+
+> you can use path functions to operate valid path string
+
+### join(path: string, extra: string) -> string
+
+This function can help you extend a path, you can extend any path, dirname or filename.
+
+```lua
+local current_path = "~/hello/dioxus"
+local new_path = plugin.path.join(current_path, "world")
+-- new_path = "~/hello/dioxus/world"
+```
+
+### parent(path: string) -> string
+
+This function will return `path` parent-path string, back to the parent.
+
+```lua
+local current_path = "~/hello/dioxus"
+local new_path = plugin.path.parent(current_path)
+-- new_path = "~/hello/"
+```
+
+### exists(path: string) -> boolean
+
+This function can check some path (dir & file) is exists.
+
+### is_file(path: string) -> boolean
+
+This function can check some path is a exist file.
+
+### is_dir(path: string) -> boolean
+
+This function can check some path is a exist dir.