docs: add shield.io badges + install note (#1)

README.md

@@ -1,3 +1,16 @@
+# Nest MQTT
+
+[![NPM Version](https://img.shields.io/npm/v/%40evva%2Fnest-mqtt)](https://www.npmjs.com/package/@evva/nest-mqtt)
+[![NPM Downloads](https://img.shields.io/npm/dy/%40evva%2Fnest-mqtt)](https://www.npmjs.com/package/@evva/nest-mqtt)
+![NPM Unpacked Size (with version)](https://img.shields.io/npm/unpacked-size/%40evva%2Fnest-mqtt/latest)
+![GitHub last commit](https://img.shields.io/github/last-commit/evva-sfw/nest-mqtt)
+[![GitHub branch check runs](https://img.shields.io/github/check-runs/evva-sfw/nest-mqtt/main)]([URL](https://github.com/evva-sfw/nest-mqtt/actions))
+[![EVVA License](https://img.shields.io/badge/license-EVVA_License-yellow.svg?color=fce500&logo=data:image/svg+xml;base64,PCEtLSBHZW5lcmF0ZWQgYnkgSWNvTW9vbi5pbyAtLT4KPHN2ZyB2ZXJzaW9uPSIxLjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgd2lkdGg9IjY0MCIgaGVpZ2h0PSIxMDI0IiB2aWV3Qm94PSIwIDAgNjQwIDEwMjQiPgo8ZyBpZD0iaWNvbW9vbi1pZ25vcmUiPgo8L2c+CjxwYXRoIGZpbGw9IiNmY2U1MDAiIGQ9Ik02MjIuNDIzIDUxMS40NDhsLTMzMS43NDYtNDY0LjU1MmgtMjg4LjE1N2wzMjkuODI1IDQ2NC41NTItMzI5LjgyNSA0NjYuNjY0aDI3NS42MTJ6Ij48L3BhdGg+Cjwvc3ZnPgo=)](LICENSE)
+
+## Install
+
+`npm i @evva/nest-mqtt`
+
 ## Description
 
 Client implementation for an MQTT Broker that also supports shared subscriptions.
@@ -11,7 +24,7 @@ $ nest build
 
 ## Usage
 
-```
+```ts
   MqttModule.forRootAsync({
       imports: [ConfigModule],
       inject: [ConfigService],
@@ -31,7 +44,7 @@ $ nest build
 
 When using the ConfigService, make sure that the variables are loaded before accessing them.
 This usually works as follows:
-```
+```ts
 export class MyModule implements OnModuleInit {