Update issue templates

Documents from teams and project setup

.github/ISSUE_TEMPLATE/bug_report.md

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+---
+name: Bug report
+about: Create a report to document bugs.
+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:
+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.
+
+**Class / Methods**
+List of classes or methods which contains the bug. (If known)
+
+**Additional context**
+Add any other context about the problem here.

.github/ISSUE_TEMPLATE/feature_request.md

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+---
+name: Feature request
+about: Features to implement
+title: "[FEATURE]"
+labels: feature
+assignees: ''
+
+---
+
+**Description of Usecase**
+A clear and concise description of what the feature allows to do.
+
+**Describe the solution you'd like**
+A clear and concise description of what you want to happen.
+
+**List of Classes and Methods to implement**
+List all Classes and Methods which have to be implemented.
+
+**Additional context**
+Add any other context or screenshots about the feature request here.

.github/ISSUE_TEMPLATE/tests.md

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+---
+name: Tests
+about: Tests to implement
+title: "[TEST]"
+labels: Tests
+assignees: ''
+
+---
+
+**Feature description**
+A clear and concise description of the functionality which have to be tested.
+
+**Test cases**
+A list of cases which have to be tested.
+
+**List of affected Classes and Methods**
+A clear and concise list of the classes and methods which have to be tested.
+
+**Additional context**
+Add any other context or screenshots about the feature request here.