chore: disable issues and direct ppl to web-components repo [skip ci] (…

…#576)

All component-related issues (for any version of the component) should be opened either in the web-components monorepo (if it's reproducible with TypeScript and HTML, without Vaadin Flow / Java), or in the flow-components monorepo (if it's about the Java API).
This repository remains open only to be able to release fixes for the versions of this web component used with Vaadin 10, 14 and Vaadin 19 for as long as they are maintained.

In order to make this clear for users, this PR
 - updates the README to make the role of this repo and it relationship with the web-components monorepo very clear
 - disables new issues in this repo: any attempt to create a new issue here would direct the users either to the web-components or to the flow-components monorepo

Related to: vaadin/components-team-tasks#584

.github/ISSUE_TEMPLATE/config.yml

@@ -0,0 +1,8 @@
+blank_issues_enabled: false
+contact_links:
+  - name: "Web Components: Bugs and Feature Requests"
+    url: https://github.com/vaadin/web-components/issues/new/choose
+    about: Please report issues related to the TypeScript and HTML API of Vaadin components here.
+  - name: "Flow Components: Bugs and Feature Requests"
+    url: https://github.com/vaadin/flow-components/issues/new/choose
+    about: Please report issues related to the Java API of Vaadin components here.

README.md

@@ -1,23 +1,23 @@
+# Vaadin Charts
+
+> ⚠️ Starting from Vaadin 20, the source code and issues for this component are migrated to the [`vaadin/web-components`](https://github.com/vaadin/web-components/tree/master/packages/vaadin-charts) monorepository.
+> This repository contains the source code and releases of `<vaadin-chart>` for the Vaadin versions 10 to 19.
+
+[Vaadin Charts](https://vaadin.com/components/vaadin-charts) is a Web Component for creating high quality charts, part of the [Vaadin components](https://vaadin.com/components).
+
+[Live Demo ↗](https://vaadin.com/components/vaadin-charts/examples)
+|
+[API documentation ↗](https://vaadin.com/components/vaadin-charts/html-api)
+
 [![npm version](https://badgen.net/npm/v/@vaadin/vaadin-charts)](https://www.npmjs.com/package/@vaadin/vaadin-charts)
 [![Bower version](https://badgen.net/github/release/vaadin/vaadin-charts)](https://github.com/vaadin/vaadin-charts/releases)
 [![Build Status](https://travis-ci.org/vaadin/vaadin-charts.svg?branch=master)](https://travis-ci.org/vaadin/vaadin-charts)
 [![Coverage Status](https://coveralls.io/repos/github/vaadin/vaadin-charts/badge.svg?branch=master)](https://coveralls.io/github/vaadin/vaadin-charts?branch=master)
 [![Published on webcomponents.org](https://img.shields.io/badge/webcomponents.org-published-blue.svg)](https://www.webcomponents.org/element/vaadin/vaadin-charts)
 [![Gitter](https://badges.gitter.im/Join%20Chat.svg)](https://gitter.im/vaadin/web-components?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge)
-
 [![Published on Vaadin  Directory](https://img.shields.io/badge/Vaadin%20Directory-published-00b4f0.svg)](https://vaadin.com/directory/component/vaadinvaadin-element)
 [![Stars on vaadin.com/directory](https://img.shields.io/vaadin-directory/star/vaadin-charts.svg)](https://vaadin.com/directory/component/vaadinvaadin-charts)
 
-
-# Vaadin Charts
-
-[Live Demo ↗](https://vaadin.com/components/vaadin-charts/examples)
-|
-[API documentation ↗](https://vaadin.com/components/vaadin-charts/html-api)
-
-
-[Vaadin Charts](https://vaadin.com/components/vaadin-charts) is a Web Component for creating high quality charts, part of the [Vaadin components](https://vaadin.com/components).
-
 <!--
 ```
 <custom-element-demo>