Introduce issue templates

.github/ISSUE_TEMPLATE/bug_report.md

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+---
+name: Bug report
+about: Create a report to help us improve
+title: "[BUG]"
+labels: 'bug'
+assignees: ''
+
+---
+
+**Describe the bug**
+A clear and concise description of what the bug is.
+
+**To Reproduce**
+Steps to reproduce the behavior:
+Please add a step-by-step guide to reproduce the issue.
+
+If an exception is thrown or an error occurs, the full stack trace
+is also helpful to gain quick insight.
+
+**Expected behavior**
+A clear and concise description of what you expected to happen.
+
+**Screenshots**
+If applicable, add screenshots to help explain your problem.
+
+**TYPO3 Setup**
+* TYPO3 Version
+* Server (Apache-cgi/Apache-fpm/nginx-fm/other)
+* Database type and version (SQLite/Postgres/MariaDB/MySQL)
+* PHP version
+* DeepL free or paid API?
+* composer or classic setup?
+
+**Additional context**
+Add any other context about the problem here.

.github/ISSUE_TEMPLATE/feature_request.md

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+---
+name: Feature request
+about: Suggest an idea for this project
+title: '[FEATURE]'
+labels: 'enhancement'
+assignees: ''
+
+---
+
+**Is your feature request related to a problem? Please describe.**
+A clear and concise description of what the problem is.
+We will only implement features that actually improve the overall usefulness of
+this extension. Special requirements without benefit for all users will not be considered.
+Instead, you can make a request to receive an extension tailored to your needs.
+
+**Describe the solution you'd like**
+A clear and concise description of what you want to happen.
+
+**Describe alternatives you've considered**
+A clear and concise description of any alternative solutions or features you've considered.
+
+**Additional context**
+Add any other context or screenshots about the feature request here.