feat: github actions to build and publish

- add templates for issues and pull request
- small cleanup in README

.github/PULL_REQUEST_TEMPLATE.md

@@ -0,0 +1,34 @@
+<!--
+Thank you for sending a pull request! Here some tips for contributors:
+
+1. Fill the description template below.
+2. Include appropriate tests (if necessary). Make sure that all CI checks passed.
+3. If the Pull Request is a work in progress, make use of GitHub's "Draft PR" feature and mark it as such.
+-->
+
+#### Overview
+
+<!-- Describe your changes briefly here. -->
+
+#### What this PR does / why we need it
+
+<!--
+- Please state in detail why we need this PR and what it solves.
+- If your PR closes some of the existing issues, please add links to them here.
+  Mentioned issues will be automatically closed.
+  Usage: "Closes #<issue number>", or "Closes (paste link of issue)"
+-->
+
+#### Special notes for your reviewer
+
+#### Does this PR introduce a user-facing change?
+
+<!--
+If no, just write "NONE" in the release-note block below.
+If yes, a release note is required:
+Enter your extended release note in the block below. If the PR requires additional action from users switching to the new release, include the string "action required".
+-->
+
+```release-note
+
+```