Add issue templates (#75)

.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: ''
+
+---
+
+<!-- Thanks for using LibHaLo. Please fill out the form below in order to allow us to understand the issue quicker. -->
+**Describe the bug**
+Please provide a concise description of the bug.
+
+**Affected platforms**
+Please check the checkbox appropriate for the platform where you have encountered the bug.
+* [ ] Web (standalone library)
+* [ ] Web (React.js or other virtual DOM framework)
+* [ ] Mobile (React Native applications)
+* [ ] HaLo Command Line Interface Tool
+* [ ] Custom desktop applications (PC/SC)
+* [ ] Not applicable
+
+**Device on which the bug occurred**
+Please check the checkbox corresponding to your device where the bug occurred. If possible, please fill out the device model (only for smartphones).
+* [ ] iPhone (model: ...)
+* [ ] Android smartphone (model: ...)
+* [ ] Linux desktop
+* [ ] Windows desktop
+* [ ] MacOS desktop
+* [ ] Not applicable
+
+**Your HaLo tag version**
+<!--
+If applicable, please check your HaLo tag version:
+on the desktop: by using `halocli version` command;
+on the smartphone: please install NFC Tools application (by wakdev), then please scan your HaLo tag in order to collect a sample of the dynamic URL, the version will be denoted in the "v=" query string parameter;
+You can leave this field blank if you are not able to check HaLo tag version.
+-->
+**Affected firmware version:** ...

.github/ISSUE_TEMPLATE/feature_request.md

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+---
+name: Feature request
+about: Suggest an idea for this project
+title: ''
+labels: enhancement
+assignees: ''
+
+---
+
+<!-- Thanks for using LibHaLo! Please fill out the form below in order to create a feature request. -->
+**Describe the solution you'd like**
+Please provide a concise description of what you want to be added to LibHaLo or the surrounding ecosystem.

.github/ISSUE_TEMPLATE/other-issue.md

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+---
+name: Other issue
+about: Report other issue that is not related to a bug or specific feature request
+title: ''
+labels: ''
+assignees: ''
+
+---
+
+<!-- Thanks for using LibHaLo. Please describe your issue below. -->