feat(tapable): add readme

packages/tapable/README.md

@@ -0,0 +1,22 @@
+# Tapable
+
+Just a little module for plugins.
+
+
+## usage
+
+```ts
+import { SyncHook } from "../../src/index";
+
+const hook = new SyncHook(["arg1"]);
+
+hook.tap("event1", (...args) => {
+  console.log("event1", ...args);
+});
+
+hook.tap("event2", (...args) => {
+  console.log("event2", ...args);
+});
+
+hook.call("hua hua");
+```