Adds Issue Templates to Issues (#664)

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name: 🐛 Bug Report

about: Report errors and problems

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**ISIS version(s) affected**: x.y.z

**Description**  

<!-- A clear and concise description of the problem. -->

**How to reproduce**  

<!-- Code and/or config needed to reproduce the problem. -->

**Possible Solution**  

<!--- Optional: only if you have suggestions on a fix/reason for the bug -->

**Additional context**  

<!-- Optional: any other context about the problem: log messages, screenshots, etc. -->

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name: 🚀 Feature Request

about: RFC and ideas for new features and improvements

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**Description**  

<!-- A clear and concise description of the new feature. -->

**Example**  

<!-- A simple example of the new feature in action (include code, links to necessary data, etc.)

     If the new feature changes an existing feature, include a simple before/after comparison. -->

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name: ⛔ Support Question

about: See https://astrodiscuss.usgs.gov for questions about using ISIS3 and other

Astrogeology Science Center software.

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We use GitHub issues only to discuss about ISIS3 bugs and new features. For

questions about using ISIS3 or other ASC software, please use

any of the support alternatives: https://astrodiscuss.usgs.gov or https://gitter.im/USGS-Astrogeology/IAA

Thanks!

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name: ⛔ Documentation Issue

about: Report issues or problems with documentation.

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**Description**

<!-- A clear and concise description of the problem. -->

**Suggested Edit**

<!--- Optional: only if you have suggestions on a fix for the documentation -->

Thanks!