Add links for other communication channels to the GitHub issue template chooser

The automatically created issue template chooser provides a menu of links to the available issue report templates as
well as the security policy at the start of the issue creation process.

It is also possible to add additional arbitrary items to the chooser, through GitHub's "Contact Links" feature. These
are defined in a configuration file:

https://docs.github.com/en/communities/using-templates-to-encourage-useful-issues-and-pull-requests/configuring-issue-templates-for-your-repository#configuring-the-template-chooser

These links offer the possibility to redirect support requests and other sub-optimal usages of the issues to the
appropriate location. This benefits the user by providing them with a fast and frictionless path to what they need, and
benefits the maintainers by preventing inappropriate issues.

.github/ISSUE_TEMPLATE/config.yml

@@ -0,0 +1,13 @@
+# Source:
+# https://github.com/arduino/tooling-project-assets/blob/main/issue-templates/template-choosers/general/config.yml
+blank_issues_enabled: false
+contact_links:
+  - name: Learn about using this project
+    url: https://github.com/arduino/arduino-ide#readme
+    about: Detailed usage documentation is available here.
+  - name: Support request
+    url: https://forum.arduino.cc/
+    about: We can help you out on the Arduino Forum!
+  - name: Discuss development work on the project
+    url: https://groups.google.com/a/arduino.cc/g/developers
+    about: Arduino Developers Mailing List