Prepare CLI for move into mainline

packages/cli/examples/plugin/init.lua

@@ -0,0 +1,18 @@
+local Api = require("./interface")
+local log = Api.log;
+
+local manager = {
+    name = "Dioxus-CLI Plugin Demo",
+    repository = "http://github.com/DioxusLabs/cli",
+    author = "YuKun Liu <mrxzx.info@gmail.com>",
+}
+
+manager.onLoad = function ()
+    log.info("plugin loaded.")
+end
+
+manager.onStartBuild = function ()
+    log.warn("system start to build")
+end
+
+return manager

packages/cli/examples/plugin/interface.lua

@@ -0,0 +1,25 @@
+local interface = {}
+
+if plugin_logger ~= nil then
+    interface.log = plugin_logger
+else
+    interface.log = {
+        trace = function (info)
+            print("trace: " .. info)
+        end,
+        debug = function (info)
+            print("debug: " .. info)
+        end,
+        info = function (info)
+            print("info: " .. info)
+        end,
+        warn = function (info)
+            print("warn: " .. info)
+        end,
+        error = function (info)
+            print("error: " .. info)
+        end,
+    }
+end
+
+return interface