Move plugins to express-twtkpr-core-plugins package

Add plugin structure
Fix stale cache after posting
Update to v0.9.0

README.md

@@ -5,7 +5,8 @@ An [ExpressJS](https://expressjs.com/) router for serving, sharing, and updating
 
 > [!WARNING]  
 > **STILL IN ALPHA**: Although this is a fully-functional plugin which is actively deployed to at least one site (my
-> own), it currently lacks documentation, examples, tests, installation flexibility, or polish.
+> own), it currently lacks documentation, examples, tests, installation flexibility, or polish (and still has a couple
+> of bugs that need to be fixed).
 > _USE AT YOUR OWN RISK_
 
 ### Features
@@ -17,10 +18,56 @@ An [ExpressJS](https://expressjs.com/) router for serving, sharing, and updating
 
 ## Installing
 
+Add package:
+
 ```sh
 yarn add express-twtkpr
 ```
 
+Generate hash:
+
+```sh
+yarn run get:hash
+```
+
+Create username and password:
+
+```sh
+yarn run set:user
+```
+
+## Using
+
+Use it in an express application:
+
+```
+import express, { Request, Response } from "express";
+
+import twtkpr from "express-twtkpr";
+
+// import other middleware
+
+const app = express();
+
+// add other middleware
+
+app.use(
+	"/",
+	twtkpr(
+		{
+			// config options
+		},
+	),
+);
+
+// add error handler
+
+export default app;
+
+```
+
+Starting with v0.9.0, extra features (like files uploading) were moved to the [express-twtkpr-core-plugins](https://www.npmjs.com/package/express-twtkpr-core-plugins) package.
+
 More to come!
 
 ---