chore: add a openapi demo package

.gitignore

@@ -1,8 +1,9 @@
 /.husky
 /docs/.vitepress/dist
 
+.DS_Store
 .reports/
 node_modules/
 templates/
 *.log
-*.tgz
+*.tgz

packages/openapi/.gitignore

@@ -0,0 +1,3 @@
+/dist
+/node_modules
+/typescript-rxjs

packages/openapi/README.md

@@ -0,0 +1,26 @@
+[![travis-ci][travis-ci]][travis-ci-url]
+[![dependencies][dependencies]][dependencies-url]
+[![vulnerabilities][vulnerabilities]][vulnerabilities-url]
+[![npm][npm]][npm-url]
+[![downloads][downloads]][downloads-url]
+[![install-size][install-size]][install-size-url]
+[![lernajs][lernajs]][lernajs-url]
+
+[npm]: https://img.shields.io/npm/v/@leanup/openapi-demo
+[npm-url]: https://www.npmjs.com/package/@leanup/openapi-demo
+[dependencies]: https://img.shields.io/david/modevel/leanup?path=lib
+[dependencies-url]: https://david-dm.org/modevel/leanup?path=lib
+[vulnerabilities]: https://img.shields.io/snyk/vulnerabilities/npm/@leanup/openapi-demo
+[vulnerabilities-url]: https://snyk.io/test/npm/@leanup/openapi-demo
+[downloads]: https://img.shields.io/npm/dm/@leanup/openapi-demo
+[downloads-url]: https://npmcharts.com/compare/@leanup/openapi-demo?minimal=true
+[travis-ci]: https://travis-ci.com/modevel/leanup.svg?branch=master
+[travis-ci-url]: https://travis-ci.com/modevel/leanup
+[install-size]: https://packagephobia.now.sh/badge?p=@leanup/openapi-demo@next
+[install-size-url]: https://packagephobia.now.sh/result?p=@leanup/openapi-demo@next
+[lernajs]: https://img.shields.io/badge/managed%20with-lerna-blueviolet
+[lernajs-url]: https://lerna.js.org
+
+# LEAN⭧up OpenAPI Demo
+
+`@leanup/openapi-demo` contains a simple Rest-API.

packages/openapi/openapitools.json

@@ -0,0 +1,7 @@
+{
+  "$schema": "node_modules/@openapitools/openapi-generator-cli/config.schema.json",
+  "spaces": 2,
+  "generator-cli": {
+    "version": "5.2.1"
+  }
+}