added templates for PRs and issues

.github/ISSUE_TEMPLATE/BUG_REPORT.md

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+---
+name: "Bug report \U0001F41B"
+about: Report errors or unexpected behaviour
+title: 'Bug Report'
+labels: bug
+assignees: 'marvinbuss'
+
+---
+
+<!-- Please read our Rules of Conduct: https://opensource.microsoft.com/codeofconduct/ -->
+<!-- Please search existing issues to avoid creating duplicates. -->
+
+**Describe the bug**
+
+
+**Steps to reproduce**
+
+1. 
+2. 
+
+**Screenshots**
+

.github/ISSUE_TEMPLATE/FEATURE_REQUEST.md

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+---
+name: "Feature request \U0001F680"
+about: Suggest an idea for this project
+title: 'Feature Request'
+labels: feature
+assignees: 'marvinbuss'
+
+---
+
+<!-- Please read our Rules of Conduct: https://opensource.microsoft.com/codeofconduct/ -->
+<!-- Please search existing issues to avoid creating duplicates. -->
+
+**Describe the solution you'd like**
+

.github/PULL_REQUEST_TEMPLATE.md

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+<!-- Thank you for submitting a Pull Request. Please: 
+* Associate an issue with the Pull Request.
+* Ensure that the code is up-to-date with the `main` branch.
+* Include a description of the proposed changes. 
+-->
+
+**This PR fixes**