Add template for issues

Author: ndem0

.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**
+The piece of code that reproduce the bug.
+
+**Expected behavior**
+A clear and concise description of what you expected to happen.
+
+**Output**
+The obtained output. Please include the entire error trace.
+
+**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: ''
+labels: enhancement
+assignees: ''
+
+---
+
+**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.

.github/ISSUE_TEMPLATE/help-wanted.md

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+---
+name: Help wanted
+about: Ask help for using the package
+title: ''
+labels: help wanted
+assignees: ''
+
+---
+
+**The objective**
+A clear description of the purpose of your application.
+
+**Already tried tests**
+The snippet of code you have already tried in order to obtain the wanted outcome.