Add issue templates

.github/ISSUE_TEMPLATE/bug_report.md

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+---
+name: Bug report
+about: Create a report to help us improve
+title: ''
+labels: bug
+assignees: ''
+
+---
+
+## Describe the bug
+_A clear and concise description of what the bug is._
+
+### To Reproduce
+_Steps to reproduce the behavior:_
+1. Go to '...'
+2. Click on '....'
+3. Scroll down to '....'
+4. See error
+
+### Expected behavior
+_A clear and concise description of what you expected to happen._
+
+### Screenshots/Error Messages
+_If applicable, add screenshots and/or error messages to help explain your problem._
+
+## Context Informations
+_Add any other context about the probleme here._
+
+- Used version: [e.g. Commit Hash]
+- OS: [e.g. Mac OS (M1), Windows, Linux] 
+- Docker Version: [e.g. 20.10.12] 
+- `java --version`: 
+
+## Possible Implementation
+_You already know the root cause of the erroneous state and how to fix it? Feel free to share your thoughts._

.github/ISSUE_TEMPLATE/feature_request.md

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+---
+name: Feature request
+about: Suggest an idea for this project
+title: ''
+labels: enhancement
+assignees: ''
+
+---
+
+_If you are missing a feature or have an idea how to improve this project that should first be 
+discussed, please feel free to open up a [discussion](https://github.com/catenax-ng/catenax-at-home/discussions/categories/ideas)._
+
+**Is your feature request related to a problem? Please describe.**
+_A clear and concise description of what the problem is. Ex. I'm always frustrated when [...]_
+
+**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._