gh: add issue templates

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name: "Bug report \U0001F41E"

about: Create a report to help us improve

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## Description

Describe the issue that you're seeing.

### Steps to reproduce

Clear steps describing how to reproduce the issue. Please please please link to a demo project if possible, this makes your issue _much_ easier to diagnose (seriously).

### Expected result

What should happen?

### Actual result

What happened.

### Environment

Paste the information here as shown by `hyas info`

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name: "Feature request \U0001F680"

about: Suggest an idea for Hyas

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## Summary

Brief explanation of the feature.

### Basic example

Include a basic example or links here.

### Motivation

Why are we doing this? What use cases does it support? What is the expected outcome?