doc: Templates

Author: lahovniktadej

.github/templates/FEATURE_REQUEST.md

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+### Feature Request
+
+**About**:
+**Title**:
+
+**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/templates/ISSUE_TEMPLATE.md

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+### Bug Report
+
+**About**:
+**Title**:
+
+**Steps to reproduce**
+Tell us how to reproduce the bug.
+
+**Expected behavior**
+Tell us what should happen.
+
+**Actual behavior**
+Tell us what happens instead.
+
+**System configuration**
+
+ - OS:
+ - Python version:

.github/templates/PULL_REQUEST.md

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+### Summary
+
+Provide a general description of the code changes in your pull
+request... were there any bugs you had fixed? If so, mention them. If
+these bugs have open GitHub issues, be sure to tag them here as well,
+to keep the conversation linked together.
+
+### Other Information
+
+If there's anything else that's important and relevant to your pull
+request, mention that information here. This could include
+benchmarks, or other information.
+
+Thanks for contributing to Firefly Algorithm!